The Bitcoin Generator - Generate Free BTC to Your Wallet ...

I made my own Bitcoin address generator using Java.

I have no one to share this with that would care or understand what I’m talking about so I’m sharing my excitement here.
I’m starting to understand the inner workings of cryptography a lot better now :) thanks Bitcoin.
submitted by Septem_151 to Bitcoin [link] [comments]

Ultimate glossary of crypto currency terms, acronyms and abbreviations

I thought it would be really cool to have an ultimate guide for those new to crypto currencies and the terms used. I made this mostly for beginner’s and veterans alike. I’m not sure how much use you will get out of this. Stuff gets lost on Reddit quite easily so I hope this finds its way to you. Included in this list, I have included most of the terms used in crypto-communities. I have compiled this list from a multitude of sources. The list is in alphabetical order and may include some words/terms not exclusive to the crypto world but may be helpful regardless.
Two factor authentication. I highly advise that you use it.
51% Attack:
A situation where a single malicious individual or group gains control of more than half of a cryptocurrency network’s computing power. Theoretically, it could allow perpetrators to manipulate the system and spend the same coin multiple times, stop other users from completing blocks and make conflicting transactions to a chain that could harm the network.
Address (or Addy):
A unique string of numbers and letters (both upper and lower case) used to send, receive or store cryptocurrency on the network. It is also the public key in a pair of keys needed to sign a digital transaction. Addresses can be shared publicly as a text or in the form of a scannable QR code. They differ between cryptocurrencies. You can’t send Bitcoin to an Ethereum address, for example.
Altcoin (alternative coin): Any digital currency other than Bitcoin. These other currencies are alternatives to Bitcoin regarding features and functionalities (e.g. faster confirmation time, lower price, improved mining algorithm, higher total coin supply). There are hundreds of altcoins, including Ether, Ripple, Litecoin and many many others.
An event where the investors/participants are able to receive free tokens or coins into their digital wallet.
AML: Defines Anti-Money Laundering laws**.**
Getting risk-free profits by trading (simultaneous buying and selling of the cryptocurrency) on two different exchanges which have different prices for the same asset.
Being Ashdraked is essentially a more detailed version of being Zhoutonged. It is when you lose all of your invested capital, but you do so specifically by shorting Bitcoin. The expression “Ashdraked” comes from a story of a Romanian cryptocurrency investor who insisted upon shorting BTC, as he had done so successfully in the past. When the price of BTC rose from USD 300 to USD 500, the Romanian investor lost all of his money.
ATH (All Time High):
The highest price ever achieved by a cryptocurrency in its entire history. Alternatively, ATL is all time low
A tendency of prices to fall; a pessimistic expectation that the value of a coin is going to drop.
Bear trap:
A manipulation of a stock or commodity by investors.
The very first, and the highest ever valued, mass-market open source and decentralized cryptocurrency and digital payment system that runs on a worldwide peer to peer network. It operates independently of any centralized authorities
One of the biggest scams in the crypto world. it was made popular in the meme world by screaming idiot Carlos Matos, who infamously proclaimed," hey hey heeeey” and “what's a what's a what's up wasssssssssuuuuuuuuuuuuup, BitConneeeeeeeeeeeeeeeeeeeeeeeect!”. He is now in the mentally ill meme hall of fame.
A package of permanently recorded data about transactions occurring every time period (typically about 10 minutes) on the blockchain network. Once a record has been completed and verified, it goes into a blockchain and gives way to the next block. Each block also contains a complex mathematical puzzle with a unique answer, without which new blocks can’t be added to the chain.
An unchangeable digital record of all transactions ever made in a particular cryptocurrency and shared across thousands of computers worldwide. It has no central authority governing it. Records, or blocks, are chained to each other using a cryptographic signature. They are stored publicly and chronologically, from the genesis block to the latest block, hence the term blockchain. Anyone can have access to the database and yet it remains incredibly difficult to hack.
A tendency of prices to rise; an optimistic expectation that a specific cryptocurrency will do well and its value is going to increase.
Buy the fucking dip. This advise was bestowed upon us by the gods themselves. It is the iron code to crypto enthusiasts.
Bull market:
A market that Cryptos are going up.
An agreement among blockchain participants on the validity of data. Consensus is reached when the majority of nodes on the network verify that the transaction is 100% valid.
Crypto bubble:
The instability of cryptocurrencies in terms of price value
A type of digital currency, secured by strong computer code (cryptography), that operates independently of any middlemen or central authoritie
The art of converting sensitive data into a format unreadable for unauthorized users, which when decoded would result in a meaningful statement.
The use of someone else’s device and profiting from its computational power to mine cryptocurrency without their knowledge and consent.
When HODLers(holders) eventually cash out they go to a place called crypto-Valhalla. The strong will be separated from the weak and the strong will then be given lambos.
Decentralized Autonomous Organizations. It defines A blockchain technology inspired organization or corporation that exists and operates without human intervention.
Dapp (decentralized application):
An open-source application that runs and stores its data on a blockchain network (instead of a central server) to prevent a single failure point. This software is not controlled by the single body – information comes from people providing other people with data or computing power.
A system with no fundamental control authority that governs the network. Instead, it is jointly managed by all users to the system.
Desktop wallet:
A wallet that stores the private keys on your computer, which allow the spending and management of your bitcoins.
Long red or green candles. This is a crypto signal that tells you that it is not favorable to trade at the moment. Found on candlestick charts.
Digital Signature:
An encrypted digital code attached to an electronic document to prove that the sender is who they say they are and confirm that a transaction is valid and should be accepted by the network.
Double Spending:
An attack on the blockchain where a malicious user manipulates the network by sending digital money to two different recipients at exactly the same time.
Means do your own research.
Converting data into code to protect it from unauthorized access, so that only the intended recipient(s) can decode it.
the practice of having a third party act as an intermediary in a transaction. This third party holds the funds on and sends them off when the transaction is completed.
Ethereum is an open source, public, blockchain-based platform that runs smart contracts and allows you to build dapps on it. Ethereum is fueled by the cryptocurrency Ether.
A platform (centralized or decentralized) for exchanging (trading) different forms of cryptocurrencies. These exchanges allow you to exchange cryptos for local currency. Some popular exchanges are Coinbase, Bittrex, Kraken and more.
A website which gives away free cryptocurrencies.
Fiat money:
Fiat currency is legal tender whose value is backed by the government that issued it, such as the US dollar or UK pound.
A split in the blockchain, resulting in two separate branches, an original and a new alternate version of the cryptocurrency. As a single blockchain forks into two, they will both run simultaneously on different parts of the network. For example, Bitcoin Cash is a Bitcoin fork.
Fear of missing out.
A system is frictionless when there are zero transaction costs or trading retraints.
Fear, Uncertainty and Doubt regarding the crypto market.
A fee paid to run transactions, dapps and smart contracts on Ethereum.
A 50% decrease in block reward after the mining of a pre-specified number of blocks. Every 4 years, the “reward” for successfully mining a block of bitcoin is reduced by half. This is referred to as “Halving”.
Hardware wallet:
Physical wallet devices that can securely store cryptocurrency maximally. Some examples are Ledger Nano S**,** Digital Bitbox and more**.**
The process that takes input data of varying sizes, performs an operation on it and converts it into a fixed size output. It cannot be reversed.
The process by which you mine bitcoin or similar cryptocurrency, by trying to solve the mathematical problem within it, using cryptographic hash functions.
A Bitcoin enthusiast once accidentally misspelled the word HOLD and it is now part of the bitcoin legend. It can also mean hold on for dear life.
ICO (Initial Coin Offering):
A blockchain-based fundraising mechanism, or a public crowd sale of a new digital coin, used to raise capital from supporters for an early stage crypto venture. Beware of these as there have been quite a few scams in the past.
John mcAfee:
A man who will one day eat his balls on live television for falsely predicting bitcoin going to 100k. He has also become a small meme within the crypto community for his outlandish claims.
Joy of missing out. For those who are so depressed about missing out their sadness becomes joy.
Know your customer(alternatively consumer).
This stands for Lamborghini. A small meme within the investing community where the moment someone gets rich they spend their earnings on a lambo. One day we will all have lambos in crypto-valhalla.
Away from Blockchain, it is a book of financial transactions and balances. In the world of crypto, the blockchain functions as a ledger. A digital currency’s ledger records all transactions which took place on a certain block chain network.
Trading with borrowed capital (margin) in order to increase the potential return of an investment.
The availability of an asset to be bought and sold easily, without affecting its market price.
of the coins.
Margin trading:
The trading of assets or securities bought with borrowed money.
Market cap/MCAP:
A short-term for Market Capitalization. Market Capitalization refers to the market value of a particular cryptocurrency. It is computed by multiplying the Price of an individual unit of coins by the total circulating supply.
A computer participating in any cryptocurrency network performing proof of work. This is usually done to receive block rewards.
The act of solving a complex math equation to validate a blockchain transaction using computer processing power and specialized hardware.
Mining contract:
A method of investing in bitcoin mining hardware, allowing anyone to rent out a pre-specified amount of hashing power, for an agreed amount of time. The mining service takes care of hardware maintenance, hosting and electricity costs, making it simpler for investors.
Mining rig:
A computer specially designed for mining cryptocurrencies.
A situation the price of a coin rapidly increases in value. Can also be used as: “I hope bitcoin goes to the moon”
Any computing device that connects to the blockchain network.
Open source:
The practice of sharing the source code for a piece of computer software, allowing it to be distributed and altered by anyone.
Over the counter. Trading is done directly between parties.
P2P (Peer to Peer):
A type of network connection where participants interact directly with each other rather than through a centralized third party. The system allows the exchange of resources from A to B, without having to go through a separate server.
Paper wallet:
A form of “cold storage” where the private keys are printed onto a piece of paper and stored offline. Considered as one of the safest crypto wallets, the truth is that it majors in sweeping coins from your wallets.
Pre mining:
The mining of a cryptocurrency by its developers before it is released to the public.
Proof of stake (POS):
A consensus distribution algorithm which essentially rewards you based upon the amount of the coin that you own. In other words, more investment in the coin will leads to more gain when you mine with this protocol In Proof of Stake, the resource held by the “miner” is their stake in the currency.
The competition of computers competing to solve a tough crypto math problem. The first computer that does this is allowed to create new blocks and record information.” The miner is then usually rewarded via transaction fees.
A standardized set of rules for formatting and processing data.
Public key / private key:
A cryptographic code that allows a user to receive cryptocurrencies into an account. The public key is made available to everyone via a publicly accessible directory, and the private key remains confidential to its respective owner. Because the key pair is mathematically related, whatever is encrypted with a public key may only be decrypted by its corresponding private key.
Pump and dump:
Massive buying and selling activity of cryptocurrencies (sometimes organized and to one’s benefit) which essentially result in a phenomenon where the significant surge in the value of coin followed by a huge crash take place in a short time frame.
Recovery phrase:
A set of phrases you are given whereby you can regain or access your wallet should you lose the private key to your wallets — paper, mobile, desktop, and hardware wallet. These phrases are some random 12–24 words. A recovery Phrase can also be called as Recovery seed, Seed Key, Recovery Key, or Seed Phrase.
Referring to the word “wrecked”. It defines a situation whereby an investor or trader who has been ruined utterly following the massive losses suffered in crypto industry.
An alternative payment network to Bitcoin based on similar cryptography. The ripple network uses XRP as currency and is capable of sending any asset type.
Return on investment.
A crypto term for safe popularized by the Bizonnaci YouTube channel after the CEO of Binance tweeted
“Funds are safe."
“the exchage I use got hacked!”“Oh no, are your funds safu?”
“My coins better be safu!”

The smallest fraction of a bitcoin is called a “satoshi” or “sat”. It represents one hundred-millionth of a bitcoin and is named after Satoshi Nakamoto.
Satoshi Nakamoto:
This was the pseudonym for the mysterious creator of Bitcoin.
The ability of a cryptocurrency to contain the massive use of its Blockchain.
A scaling solution for the Blockchain. It is generally a method that allows nodes to have partial copies of the complete blockchain in order to increase overall network performance and consensus speeds.
Coin with little potential or future prospects.
Spreading buzz by heavily promoting a particular coin in the community to create awareness.
Short position:
Selling of a specific cryptocurrency with an expectation that it will drop in value.
Silk road:
The online marketplace where drugs and other illicit items were traded for Bitcoin. This marketplace is using accessed through “TOR”, and VPNs. In October 2013, a Silk Road was shut down in by the FBI.
Smart Contract:
Certain computational benchmarks or barriers that have to be met in turn for money or data to be deposited or even be used to verify things such as land rights.
Software Wallet:
A crypto wallet that exists purely as software files on a computer. Usually, software wallets can be generated for free from a variety of sources.
A contract-oriented coding language for implementing smart contracts on Ethereum. Its syntax is similar to that of JavaScript.
Stable coin:
A cryptocoin with an extremely low volatility that can be used to trade against the overall market.
Staking is the process of actively participating in transaction validation (similar to mining) on a proof-of-stake (PoS) blockchain. On these blockchains, anyone with a minimum-required balance of a specific cryptocurrency can validate transactions and earn Staking rewards.
When a crypto currency appreciates or goes up in price.
The opposite of mooning. When a coin tanks it can also be described as crashing.
For traders , the chief prize is “tendies” (chicken tenders, the treat an overgrown man-child receives for being a “Good Boy”) .
A unit of value that represents a digital asset built on a blockchain system. A token is usually considered as a “coin” of a cryptocurrency, but it really has a wider functionality.
TOR: “The Onion Router” is a free web browser designed to protect users’ anonymity and resist censorship. Tor is usually used surfing the web anonymously and access sites on the “Darkweb”.
Transaction fee:
An amount of money users are charged from their transaction when sending cryptocurrencies.
A measure of fluctuations in the price of a financial instrument over time. High volatility in bitcoin is seen as risky since its shifting value discourages people from spending or accepting it.
A file that stores all your private keys and communicates with the blockchain to perform transactions. It allows you to send and receive bitcoins securely as well as view your balance and transaction history.
An investor that holds a tremendous amount of cryptocurrency. Their extraordinary large holdings allow them to control prices and manipulate the market.

A comprehensive report or guide made to understand an issue or help decision making. It is also seen as a technical write up that most cryptocurrencies provide to take a deep look into the structure and plan of the cryptocurrency/Blockchain project. Satoshi Nakamoto was the first to release a whitepaper on Bitcoin, titled “Bitcoin: A Peer-to-Peer Electronic Cash System” in late 2008.
And with that I finally complete my odyssey. I sincerely hope that this helped you and if you are new, I welcome you to crypto. If you read all of that I hope it increased, you in knowledge.
my final definition:
A collection of all the HODLers and crypto fanatics. A place where all people alike unite over a love for crypto.
We are all in this together as we pioneer the new world that is crypto currency. I wish you a great day and Happy HODLing.
feel free to comment words or terms that you feel should be included or about any errors I made.
Edit1:some fixes were made and added words.
submitted by flacciduck to CryptoCurrency [link] [comments]

What I currently use for privacy (after almost 2 years of long investing into it)

First of all, my threat model: I'm just an average person that wants to AVOID the maximum I can to be monitored and tracked by the government and big corps, a lot of people out there REALLY hate me and I've gone through lots of harassment and other stuff, I also plan to take my activism and love for freedom more seriously and to do stuff that could potentially lead me to very high danger or even put my life on the line. That being said, my main focus is on something that is privacy-friendly but also something with decent security (no point having a lot of privacy if a script kiddie can just break into it an boom, everything is gone) anonymity is also desirable but I'm pretty aware that true 100% anonymity is simply not possible and to achieve the maximum you can of it currently you'd have to give up A LOT of stuff in which I don't think I really could. So basically, everything that I said + I don't want to give up some hobbies of mine (as playing games etc)
Here's what I use/have done so far, most of it is based on list and research I've done.
Google Pixel 3a XL running GrapheneOS
Apps: Stock apps (Vanadium, Gallery, Clock, Contacts etc) + F-DROID, NewPipe, OsmAnd+, Joplin, Tutanota, K-9 Mail, Aegis Authenticator, KeePassDX, Syncthing, Signal, Librera PRO, Vinyl, Open Camera and Wireguard.
I also use BlahDNS as my private DNS.
Other smartphone stuff/habits: I use a Supershieldz Anti Spy Tempered Glass Screen Protector on my phone and I also have a Faraday Sleeve from Silent Pocket which my phone is on most of the times (I don't have smartphone addiction and would likely advice you to break free from smartphone addiction if you have it). I NEVER use bluetooth (thank god Pixel 3a have a headphone jack so yeah, no bluetooth earphones here) and always keep my Wi-Fi off if I'm not using it.
I have a desktop that I built (specs: Asus B450M Gaming, AMD Ryzen 3 3300X, Radeon RX 580 8GB, 16GB DDR4 2666Mhz, 3TB HDD, 480GB SSD) that is dualbooted with QubesOS and Arch Linux.
Qubes is my main OS that I use as daily driver and for my tasks, I use Arch for gaming.
I've installed linux-hardened and its headers packages on my Arch + further kernel hardening using systctl and boot parameters, AppArmor as my MAC system and bubblewrap for sandboxing programs. I also spoof my MAC address and have restricted root access, I've also protected my GRUB with password (and use encrypted boot) and have enabled Microcode updates and have NTP and IPV6 disabled.
Also on Arch, I use iptables as a firewall denying all incoming traffic, and since it's my gaming PC, I don't game on the OS, instead, I use a KVM/QEMU Windows VM for gaming (search "How I Built The "Poor-Shamed" Computer" video to see what I'm talking about) I also use full disk encryption.
E-Mails: I use ProtonMail (Plus Account paid with bitcoin) and Tutanota (free account as they don't accept crypto payment yet, come on Tutanota, I've been waiting for it for 2 years already) since I have plus account on ProtonMail it allows me to use ProtonMail Bridge and use it on Claws Mail (desktop) and K-9 Mail (mobile) as for Tutanota I use both desktop and mobile app.
Some other e-mails habits of mine: I use e-mail aliases (ProtonMail plus account provides you with 5) and each alias is used for different tasks (as one for shopping, one for banking, one for accounts etc) and none of my e-mails have my real name on it or something that could be used to identify me. I also highly avoid using stuff that require e-mail/e-mail verification for usage (e-mail is such a pain in the ass tbh) I also make use of Spamgourmet for stuff like temporary e-mail (best service I found for this doing my research, dunno if it's really the best tho, heard that AnonAddy does kinda the same stuff but dunno, recommendations are welcomed)
Browsers/Search Engine: As mentioned, I use Vanadium (Graphene's stock browser) on mobile as it is the recommended browser by Graphene and the one with the best security for Android, for desktop I use a Hardened Firefox (pretty aware of Firefox's security not being that good, but it's the best browser for PC for me as Ungoogled Chromium is still not there in A LOT of things + inherent problems of Chrome as not being able to disable WebRTC unless you use an extension etc) with ghacks-user.js and uBlock Origin (hard mode), uMatrix (globally blocking first party scripts), HTTPS Everywhere (EASE Mode), Decentraleyes (set the recommended rules for both uBlock Origin and uMatrix) and Temporary Containers as addons. I also use Tor Browser (Safest Mode) on a Whonix VM on Qubes sometimes. DuckDuckGo is my to-go search engine and I use DNS over HTTPS on Firefox (BlahDNS as my provider once again)
browsing habits: I avoid JavaScript the maximum I can, if it's really needed, I just allow the scripts temporarely on uBlock Origin/uMatrix and after I'm done I just disable it. I also generally go with instead of (as JavaScript is not required to browse the old client), for checking twitter stuff (although I rarely have something peaking my interest on Twitter) and I use as youtube front-end (I do however use YouTube sometimes if a video I wanna see can't be played on invidious or if I wanna watch a livestream) and instead of other than avoiding JavaScript most of my browsing habits are just common sense at this point I'd say, I also use privatebin (snopyta's instance) instead of pastebin. I also have multiple firefox profiles for different tasks (personal usage, shopping, banking etc)
VPN: I use Mullvad (guess you can mention it here since it's PTIO's recommended) paid with bitcoin and honestly best service available tbh. I use Mullvad's multihop implementation on Wireguard which I manually set myself as I had the time and patience to learn how.
password manager: KeePassXC on desktop and KeePassDX on my smartphone, my password database for my desktop is stored on a USB flash driver I encrypted with VeraCrypt.
some other software on desktop: LibreOffice (as a Microsoft Office substitute), GIMP (Photshop substitute), Vim (I use it for multiple purposes, mainly coding IDE and as a text editor), VLC (media player), Bisq (bitcoin exchange), Wasabi (bitcoin wallet), OBS (screen recording), Syncthing (file sync), qBitTorrent (torrent client) and Element (federated real-time communication software). I sadly couldn't find a good open-source substitute to Sony Vegas (tested many, but none was in the same level of Vegas imo, KDENLive is okay tho) so I just use it on a VM if I need it (Windows VM solely for the purpose of video editing, not the same one I use for gaming)
router: I have an Asus RT-AC68U with OpenWRT as its firmware. I also set a VPN on it.
cryptocurrency hardware wallet: I store all of my cryptocurrency (Bitcoin and Monero) on a Ledger Nano S, about 97% of my money is on crypto so a hardware wallet is a must for me.
I have lots of USB flash drivers that I use for Live ISOs and for encrypted backups. I also have a USB Data Blocker from PortaPow that I generally use if I need to charge my cellphone in public or in a hotel while on a trip (rare occasion tbh).
I have a Logitech C920e as webcam and a Blue Yeti microphone in which I never let them plugged, I only plug them if it's necessary and after I'm done I just unplug them.
I also have a Nintendo Switch Lite as a gaming console that I most of the times just use offline, I just connect to the internet if needed for a software update and then just turn the Wi-Fi off from it.
Other Habits/Things I've done:
payments: I simply AVOID using credit card, I try to always pay on cash (I live in a third-world country so thank god most of people here still depend on cash only) physically and online I try my best to either by using cryptocurrency or using gift cards/cash by mail if crypto isn't available. I usually buy crypto on Bisq as I just don't trust any KYC exchange (and neither should you) and since there aren't many people here in my area to do face to face bitcoin trade (and I'm skeptical of face to face tbh), I use the Wasabi Wallet (desktop) to coinjoin bitcoin before buying anything as this allows a bit more of privacy, I also coinjoin on Wasabi before sending my bitcoins to my hardware wallet. I also don't have a high consumerism drive so I'm not constantly wanting to buy everything that I see (which helps a lot on this criteria)
social media/accounts: as noted, aside from Signal and Element (which I don't even use that often) I just don't REALLY use any social media (tried Mastodon for a while but I was honestly felt it kinda desert there and most of its userbase from what I've seen were some people I'd just... rather don't hang with tbh) and, althoug not something necessary is something that I really advise people to as social media is literally a poison to your mind.
I also don't own any streaming service like Netflix/Amazon Prime/Spotify etc, I basically pirate series/movies/songs and that's it.
I've also deleted ALL my old accounts from social media (like Twitter etc) and old e-mails. ALL of my important and main accounts have 2FA enabled and are protected by a strong password (I use KeePass to generate a 35 character lenght password with numbers, capital letters, special symbols etc, each account uses a unique password) I also NEVER use my real name on any account and NEVER post any pictures of myself (I rarely take pictures of stuff if anything)
iot/smart devices: aside from my smartphone, I don't have any IOT/smart device as I honestly see no need for them (and most of them are WAY too expensive on third-world countries)
files: I constatly backup all of my files (each two weeks) on encrypted flash drivers, I also use BleachBit for temporary data cleaning and data/file shredding. I also use Syncthing as a substitute to stuff like Google Drive.
Future plans:
learn to self-host and self-host an e-mail/NextCloud (and maybe even a VPN)
find something like BurneHushed but FOSS (if you know any please let me know)
So, how is it? anything that I should do that I'm probably not doing?
submitted by StunningDistrust to privacytoolsIO [link] [comments]

Delightful Privacy

Delightful Privacy delightful

This is a collection of software, operating systems, and other miscellaneous tools to help the average user fight for their privacy and security online.

Operating Systems


Fedora uses Security-Enhanced Linux by default, which implements a variety of security policies, including mandatory access controls, which Fedora adopted early on. Fedora provides a hardening wrapper, and does hardening for all of its packages by using compiler features such as position-independent executable (PIE). Wikipedia


Pop!_OS provides full out-of-the-box support for both AMD and Nvidia GPUs. It is regarded as an easy distribution to set-up for gaming, mainly due to its built-in GPU support. Pop!_OS provides default disk encryption, streamlined window and workspace management, keyboard shortcuts for navigation as well as built in power management profiles. The latest releases also have packages that allow for easy setup for TensorFlow and CUDA. Wikipedia


Debian is one of the oldest operating systems based on the Linux kernel. The project is coordinated over the Internet by a team of volunteers guided by the Debian Project Leader and three foundational documents: the Debian Social Contract, the Debian Constitution, and the Debian Free Software Guidelines. New distributions are updated continually, and the next candidate is released after a time-based freeze. Wikipedia

openSUSE Tumbleweed - Rolling Release!

Any user who wishes to have the newest packages that include, but are not limited to, the Linux Kernel, SAMBA, git, desktops, office applications and many other packages, will want Tumbleweed. openSUSE

For enhanced security

Qubes OS

Qubes OS is a security-focused desktop operating system that aims to provide security through isolation. Virtualization is performed by Xen, and user environments can be based on Fedora, Debian, Whonix, and Microsoft Windows, among other operating systems. Wikipedia


Tails, or The Amnesic Incognito Live System, is a security-focused Debian-based Linux distribution aimed at preserving privacy and anonymity. All its incoming and outgoing connections are forced to go through Tor, and any non-anonymous connections are blocked. Wikipedia).*


Whonix is a Debian GNU/Linux–based security-focused Linux distribution. It aims to provide privacy, security and anonymity on the internet. The operating system consists of two virtual machines, a "Workstation" and a Tor "Gateway", running Debian GNU/Linux. All communications are forced through the Tor network to accomplish this. Wikipedia

Web Browsers

For Desktop

Firefox Needs manual tweaking to be more secure! Use ghacks

Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. Wikipedia Recommended addons: uBlock Origin | Https Everywhere | Privacy Badger | Privacy Possum | Decentraleyes | NoScript | CanvasBlocker


Tor is free and open-source software for enabling anonymous communication. The name derived from the acronym for the original software project name "The Onion Router". Tor directs Internet traffic through a free, worldwide, volunteer overlay network consisting of more than seven thousand relays to conceal a user's location and usage from anyone conducting network surveillance or traffic analysis. Using Tor makes it more difficult to trace Internet activity to the user. Wikipedia


Without signing in to a Google Account, Chromium does pretty well in terms of security and privacy. However, Chromium still has some dependency on Google web services and binaries. In addition, Google designed Chromium to be easy and intuitive for users, which means they compromise on transparency and control of internal operations.
ungoogled-chromium addresses these issues in the following ways:

For mobile

Bromite Android Only

Bromite is a Chromium fork with ad blocking and privacy enhancements; take back your browser! Bromite

Firefox Focus Android - iOS

Firefox Focus is a free and open-source privacy-focused browser from Mozilla, available for Android and iOS. Wikipedia

Tor Browser for mobile Android - iOS

Tor protects your privacy on the internet by hiding the connection between your Internet address and the services you use. We believe Tor is reasonably secure, but please ensure you read the instructions and configure it properly. GitHub



Tutanota is an end-to-end encrypted email software and freemium hosted secure email service. Wikipedia


There are many ears listening on the Internet, which is why all our services require mandatory SSL/TLS-encrypted data transmission. For additional security, we also use enhanced (green) security certificates ("EV") by the independent SwissSign trust service provider from Switzerland (Check the padlock symbol in your web browser's URL field). But this is just the beginning – there is so much more that we do. Mailbox


Disroot is a decentralized cloud-based service that allows you to store your files and communicate with one another. Established by a privacy-focused organization of volunteers, if we look at Disroot as an email provider specifically, it stands out thanks to its emphasis on security with a completly free open-source approach. ProPrivacy


ProtonMail is an end-to-end encrypted email service founded in 2013 in Geneva, Switzerland by scientists who met at the CERN research facility. ProtonMail uses client-side encryption to protect email content and user data before they are sent to ProtonMail servers, unlike other common email providers such as Gmail and The service can be accessed through a webmail client, the Tor network, or dedicated iOS and Android apps. Wikipedia

Search Engine


searx is a free metasearch engine, available under the GNU Affero General Public License version 3, with the aim of protecting the privacy of its users. To this end, searx does not share users' IP addresses or search history with the search engines from which it gathers results. Tracking cookies served by the search engines are blocked, preventing user-profiling-based results modification. By default, searx queries are submitted via HTTP POST, to prevent users' query keywords from appearing in webserver logs. Wikipedia - Find public instances of searx here


Startpage is a web search engine that highlights privacy as its distinguishing feature. Previously, it was known as the metasearch engine Ixquick, At that time, Startpage was a variant service. Both sites were merged in 2016. Wikipedia


YaCy is a free distributed search engine, built on principles of peer-to-peer (P2P) networks. Its core is a computer program written in Java distributed on several hundred computers, as of September 2006, so-called YaCy-peers. Each YaCy-peer independently crawls through the Internet, analyzes and indexes found web pages, and stores indexing results in a common database (so called index) which is shared with other YaCy-peers using principles of P2P networks. It is a free search engine that everyone can use to build a search portal for their intranet and to help search the public internet clearly. Wikipedia


If you need anonymity and privacy online use Tor instead, if you are looking to bypass a geo-restriction, don't trust public WiFi, or are looking to Torrent, a VPN will help you.


Mullvad is an open-source commercial virtual private network (VPN) service based in Sweden. Launched in March 2009, Mullvad operates using the WireGuard and OpenVPN protocols. Mullvad accepts Bitcoin and Bitcoin Cash for subscriptions in addition to conventional payment methods.
No email address or other identifying information is requested during Mullvad's registration process. Rather, a unique 16-digit account number is anonymously generated for each new user. This account number is henceforth used to log in to the Mullvad service.
The TechRadar review notes that "The end result of all this is you don't have to worry about how Mullvad handles court requests to access your usage data, because, well, there isn't any." Wikipedia


ProtonVPN utilizes OpenVPN (UDP/TCP) and the IKEv2 protocol, with AES-256 encryption. The company has a strict no-logging policy for user connection data, and also prevents DNS and Web-RTC leaks from exposing users' true IP addresses. ProtonVPN also includes Tor access support and a kill switch to shut off Internet access in the event of a lost VPN connection.
In January 2020, ProtonVPN became the first VPN provider to release its source code on all platforms and conduct an independent security audit. ProtonVPN is the only VPN to do so, even though experts say this is a crucial factor in deciding whether to trust a VPN service. Wikipedia

For information about alternatives to software and services.

If you are looking for alternatives to proprietary services like Discord and Facebook, or an open-source alternative to Photoshop, check out our list about Awesome-Alternatives

Mirrors are kept up to date, this post may lag behind as we add stuff in.

submitted by CipherOps to LinuxCafe [link] [comments] accidentally publishes on-chain proof that they fake BCHs adoption metrics. Post to r/btc gets deleted and OP is now permanently banned.

Everybody who has posted this on btc has been banned according to modlog. Total of 9 users so far. Don't post this on btc or you will get banned. If you get banned comment on this thread or PM me.

May 2020:

According to btc modlogs, mc-78 has been banned because he questioned the April report with this comment.

According to btc modlogs, BCH4TW has been banned because he questioned the April report with this comment.

March 2020:

According to btc modlogs, bch4god has been banned because he questioned the February report with this comment.

According to btc modlogs, ISeeGregPeople has been banned because he linked to this thread in his comment.

February 2020:

According to btc modlogs, whene-is-satoshi has been banned because he linked to this thread in his comment.

January 2020:

According to btc modlogs, cryptokittykiller's post has been removed for linking to this thread.

According to btc modlogs, bashcalf has now been banned for linking to this thread.

According to btc modlogs, EnterLayer2 has now been banned for this post pointing out that this thread has reached 1000 upvotes.

This article was posted by bitcoinsatellite on btc here. Once it reached frontpage it got deleted and OP was banned from btc and bitcoincash as a result.

Disclaimer: I am not and have never been affiliated with any of the mentioned parties in a private or professional matter.
Presumably in an attempt to smear a local competitor, Hayden Otto inadvertently publishes irrefutable on-chain proof that he excluded non-BCH retail revenue to shape the "BCH #1 in Australia" narrative.
  • Scroll down to "Proof of exclusion" if you are tired of the drama recap.
  • Scroll down to "TLDR" if you want a summary.


In September 2019, started publishing so called monthly "reports" about crypto retail payments in Australia. They claimed that ~90% of Australia's crypto retail revenue is processed via their own HULA system and that ~92% of all crypto retail revenue happens in BCH.
They are aggregating two data sources to come up with this claim.
One is TravelByBit (TBB) who publishes their PoS transactions (BTC, LN, ETH, BNB, DASH, BCH) live on a ticker.
The other source is HULA, a newly introduced POS system (BCH only) and direct competitor to TBB run by - the same company who created the report. Despite being on-chain their transactions are private, not published and not verifiable by third parties outside
Two things stood out in the "reports", noted by multiple users (including vocal BCH proponents):
  • The non-BCH parts must have tx excluded and the report neglects to mention it (the total in their TBB analysis does not match what is reported on the TBB website.)
  • The BCH part has outliers included (e.g. BCH city conference in September with 35x the daily average)
The TBB website loads the historic tx data in the browser but hides transactions older than 7 days from being displayed, i.e. you can access more than 7 days worth of data if you understand JavaScript and can read the source code (source).

Hayden Otto's reaction

In direct response to me publishing these findings on btc, Hayden Otto - an employee at and the author of the report who also happens to be a moderator of /BitcoinCash - banned me immediately from said sub (source).
In subsequent discussion (which repeated for every monthly "report" which was flawed in the same ways as described above), Hayden responded using the same tactics:
"No data was removed"
"The guy is straight out lying. There is guaranteed no missing tx as the data was collected directly from the source." (source)
"Only data I considered non-retail was removed"
"I also had these data points and went through them to remove non-retail transactions, on both TravelbyBit and HULA." (source)
He admits to have removed non-BCH tx by "Game Ranger" because he considers them non-retail (source). He also implies they might be involved in money laundering and that TBB might fail their AML obligations in processing Game Ranger's transactions (source).
The report does not mention any data being excluded at all and he still fails to explain why several businesses that are clearly retail (e.g. restaurants, cafes, markets) had tx excluded (source).
"You are too late to prove I altered the data"
"[...] I recorded [the data] manually from over the month of September. The website only shows transactions from the last 7 days and then they disappear. No way for anyone to access stats beyond that." (source)
Fortunately you can, if you can read the website's source code. But you need to know a bit of JavaScript to verify it yourself, so not an ideal method to easily prove the claim of data exclusion to the public. But it laters turns out Hayden himself has found an easier way to achieve the same.
"The report can't be wrong because it has been audited."
In response to criticism about the flawed methodology in generating the September report, hired an accountant from a regional Bitcoin BCH startup to "audit" the October report. This is remarkable, because not only did their reported TBB totals still not match those from the TBB site - their result was mathematically impossible. How so? No subset of TBB transaction in that month sums up to the total they reported. So even if they excluded retail transactions at will, they still must have messed up the sum (source). Why didn't their auditor notice their mistake? She said she "conducted a review based on the TravelByBit data provided to her", i.e. the data acquisition and selection process was explicitly excluded from the audit (source).
"You are a 'pathetic liar', a 'desperate toll', an 'astroturf account' and 'a total dumb ass' and are 'pulling numbers out of your ass!'"
Since he has already banned me from the sub he moderates, he started to resort to ad hominems (source, source, source, source).

Proof of exclusion

I published raw data as extracted from the TBB site after each report for comparison. Hayden responded that I made those numbers up and that I was pulling numbers out of my ass.
Since he was under the impression that
"The website only shows transactions from the last 7 days and then they disappear. No way for anyone to access stats beyond that." (source)
he felt confident to claim that I would be
unable to provide a source for the [missing] data and/or prove that that data was not already included in the report. (source)
Luckily for us Hayden Otto seems to dislike his competitor TravelByBit so much that he attempted to reframe Bitcoin's RBF feature as a vulnerability specific to TBB PoS system (source).
While doublespending a merchant using the TBB PoS he wanted to prove that the merchant successfully registered the purchase as complete and thus exposed that the PoS sales history of TBB's merchants are available to the public (source), in his own words:
"You can literally access it from a public URL in the Web browser. There is no login or anything required, just type in the name of the merchant." (source)
As of yet it is unclear if this is intentional by TBB or if Hayden Ottos followed the rules of responsible disclosure before publishing this kind of data leak.
As it happens, those sale histories do not only include the merchant and time of purchases, they even include the address the funds were sent to (in case of on-chain payments).
This gives us an easy method to prove that the purchases from the TBB website missing in the reports belong to a specific retail business and actually happened - something that is impossible to prove for the alleged HULA txs.
In order to make it easier for you to verify it yourself, we'll focus on a single day in the dataset, September 17th, 2019 as an example:
  • Hayden Otto's report claims 20 tx and $713.00 in total for that day (source)
  • The TBB website listed 40 tx and a total of $1032.90 (daily summary)
  • Pick a merchant, e.g. "The Stand Desserts"
  • Use Hayden's "trick" to access that merchants public sale history at, sort by date to find the 17th Sep 2019 and look for a transaction at 20:58 for $28. This proves that a purchase of said amount is associated with this specific retail business.
  • Paste the associated crypto on-chain address 17MrHiRcKzCyuKPtvtn7iZhAZxydX8raU9 in a blockchain explorer of your choice, e.g like this. This proves that a transfer of funds has actually happened.
I let software aggregate the TBB statistics with the public sale histories and you'll find at the bottom of this post a table with the on-chain addresses conveniently linked to blockchain explorers for our example date.
The total of all 40 tx is $1032.90 instead of the $713.00 reported by Hayden. 17 tx of those have a corresponding on-chain address and thus have undeniable proof of $758.10. Of the remaining 23, 22 are on Lightning and one had no merchant history available.
This is just for a single day, here is a comparison for the whole month.
Description Total
TBB Total $10,502
TBB wo. Game Ranger $5,407
TBB according to Hayden $3,737

What now?

The usual shills will respond in a predictive manner: The data must be fake even though its proof is on-chain, I would need to provide more data but HULA can be trusted without any proof, if you include outliers BCH comes out ahead, yada, yada.
But this is not important. I am not here to convince them and this post doesn't aim to.
The tx numbers we are talking about are less than 0.005% of Bitcoin's global volume. If you can increase adoption in your area by 100% by just buying 2 coffees more per day you get a rough idea about how irrelevant the numbers are in comparison.
What is relevant though and what this post aims to highlight is that and the media outlets around flooding you with the BCH #1 narrative are playing dirty. They feel justified because they feel that Bitcoin/Core/Blockstream is playing dirty as well. I am not here to judge that but you as a reader of this sub should be aware that this is happening and that you are the target.
When excludes $1,000 Bitcoin tx because of high value but includes $15,000 BCH tx because they are made by "professionals", you should be sceptical.
When excludes game developers, travel businesses or craftsmen accepting Bitcoin because they don't have a physical store but include a lawyer practice accepting BCH, you should be sceptical.
When excludes restaurants, bars and supermarkets accepting Bitcoin and when pressed reiterate that they excluded non-retail businesses without ever explaning why a restaurant shouldn't be considered reatil, you should be sceptical.
When claims the reports have been audited but omit that the data acquisition was not part of the audit, you should be sceptical.
I expect that will stop removing transactions from TBB for their reports now that it has been shown that their exclusion can be provably uncovered. I also expect that HULA's BCH numbers will rise accordingly to maintain a similar difference.
Hayden Otto assumed that nobody could cross-check the TBB data. He was wrong. Nobody will be able to disprove his claims when HULA's BCH numbers rise as he continues to refuse their release. You should treat his claims accordingly.
As usual, do your own research and draw your own conclusion. Sorry for the long read.


  • claimed no transactions were removed from the TBB dataset in their BCH #1 reports and that is impossible to prove the opposite.
  • Hayden Otto's reveals in a double spend attempt that a TBB merchant's sale history can be accessed publicly including the merchant's on-chain addresses.
  • (For example,) this table shows 40 tx listed on the TBB site on Sep 17th, including their on-chain addresses where applicable. The report lists only 20 tx for the same day.
  • (Most days and every months so far has had BTC transactions excluded.)
  • (For September, TBB lists $10,502 yet the report only claims $3,737.
No. Date Merchant Asset Address Amount Total
1 17 Sep 19 09:28 LTD Espresso Lightning Unable to find merchant history. 4.50 4.50
2 17 Sep 19 09:40 LTD Espresso Binance Coin Unable to find merchant history. 4.50 9.00
3 17 Sep 19 13:22 Josh's IGA Murray Bridge West Ether 0x40fd53aa...b6de43c531 4.60 13.60
4 17 Sep 19 13:23 Nom Nom Korean Eatery Lightning lnbc107727...zkcqvvgklf 16.00 29.60
5 17 Sep 19 13:24 Nom Nom Korean Eatery Lightning lnbc100994...mkspwddgqw 15.00 44.60
6 17 Sep 19 14:02 Nom Nom Korean Eatery Binance Coin bnb1w5mwu9...552thl4ru5 30.00 74.60
7 17 Sep 19 15:19 Dollars and Sense (Fortitude Valley) Lightning lnbc134780...93cpanyxfg 2.00 76.60
8 17 Sep 19 15:34 Steph's Cafe Binance Coin bnb124hcjy...ss3pz9y3r8 57.50 134.10
9 17 Sep 19 19:37 The Stand Desserts Binance Coin bnb13f58s9...qqc7fxln7s 18.00 152.10
10 17 Sep 19 19:59 The Stand Desserts Lightning lnbc575880...48cpl0z06q 8.50 160.60
11 17 Sep 19 20:00 The Stand Desserts Lightning lnbc575770...t8spzjflym 8.50 169.10
12 17 Sep 19 20:13 The Stand Desserts Lightning lnbc202980...lgqp5ha8f4 3.00 172.10
13 17 Sep 19 20:21 The Stand Desserts Lightning lnbc577010...decq7r4p05 8.50 180.60
14 17 Sep 19 20:24 Fat Dumpling Lightning lnbc217145...9dsqpjjr6g 32.10 212.70
15 17 Sep 19 20:31 The Stand Desserts Lightning lnbc574530...wvcpp3pcen 8.50 221.20
16 17 Sep 19 20:33 The Stand Desserts Lightning lnbc540660...rpqpzgk8z0 8.00 229.20
17 17 Sep 19 20:37 The Stand Desserts Lightning lnbc128468...r8cqq50p5c 19.00 248.20
18 17 Sep 19 20:39 The Stand Desserts Lightning lnbc135220...cngp2zq6q4 2.00 250.20
19 17 Sep 19 20:45 The Stand Desserts Lightning lnbc574570...atcqg738p8 8.50 258.70
20 17 Sep 19 20:51 Fat Dumpling Lightning lnbc414190...8hcpg79h9a 61.20 319.90
21 17 Sep 19 20:53 The Stand Desserts Lightning lnbc135350...krqqp3cz8z 2.00 321.90
22 17 Sep 19 20:58 The Stand Desserts Bitcoin 17MrHiRcKz...ZxydX8raU9 28.00 349.90
23 17 Sep 19 21:02 The Stand Desserts Bitcoin 1Hwy8hCBff...iEh5fBsCWK 10.00 359.90
24 17 Sep 19 21:03 The Stand Desserts Lightning lnbc743810...dvqqnuunjq 11.00 370.90
25 17 Sep 19 21:04 The Stand Desserts Lightning lnbc114952...2vqpclm87p 17.00 387.90
26 17 Sep 19 21:10 The Stand Desserts Lightning lnbc169160...lpqqqt574c 2.50 390.40
27 17 Sep 19 21:11 The Stand Desserts Lightning lnbc575150...40qq9yuqmy 8.50 398.90
28 17 Sep 19 21:13 The Stand Desserts Lightning lnbc947370...qjcp3unr33 14.00 412.90
29 17 Sep 19 21:15 The Stand Desserts Binance Coin bnb1tc2vva...xppes5t7d0 16.00 428.90
30 17 Sep 19 21:16 Giardinetto Binance Coin bnb1auyep2...w64p6a6dlk 350.00 778.90
31 17 Sep 19 21:25 The Stand Desserts BCH 3H2iJaKNXH...5sxPk3t2tV 7.00 785.90
32 17 Sep 19 21:39 The Stand Desserts Binance Coin bnb17r7x3e...avaxwumc58 8.00 793.90
33 17 Sep 19 21:47 The Stand Desserts BCH 32kuPYT1tc...uFQwgsA5ku 18.00 811.90
34 17 Sep 19 21:52 The Stand Desserts BCH 3ELPvxtCSy...4QzvfVJsNZ 36.00 847.90
35 17 Sep 19 21:56 The Stand Desserts Lightning lnbc677740...acsp04sjeg 10.00 857.90
36 17 Sep 19 22:04 The Stand Desserts BCH 38b4wHg9cg...9L2WXC2BSK 54.00 911.90
37 17 Sep 19 22:16 The Stand Desserts Binance Coin bnb14lylhs...x6wz7kjzp5 18.00 929.90
38 17 Sep 19 22:21 The Stand Desserts BCH 3L8SK3Hr7u...F3htdSPxfL 90.00 1019.90
39 17 Sep 19 22:30 The Stand Desserts Binance Coin bnb19w6tle...774uknv57t 5.00 1024.90
40 17 Sep 19 22:48 The Stand Desserts BCH 3Qag8c4UYg...9EYuWzGjhs 8.00 1032.90
submitted by YeOldDoc to CryptoCurrency [link] [comments]

Adding Monero support to a P2P game, need some advice

Hello everyone,
I'm currently in the process of adding Monero support to a peer-to-peer game I've been working on and would like to ask this community for some advice.
The application has a few hard requirements that must be met:
  1. The Monero integration must be done using JavaScript (primarily for Node but browser's okay too).
  2. The application must be able to create addresses and accompanying private keys internally (no CLI or external API). Preferably, these should be derived addresses using a master or main one (like HD wallets in Bitcoin).
  3. The application must be able to generate raw transactions internally -- no CLI or or external API. For this part let's assume that the input UTXOs are going to be available somehow (from a database, for example).
  4. The application must be able to sign raw transactions internally -- no CLI or or external API.
When I say "no CLI", I mean no RPC wallet or daemon; no external API calls either.
Essentially, I should be able to do the above offline, using JavaScript only, and then just post the signed transactions later (this part can be done via CLI or API). These are core requirements for the project otherwise I'd just use RPC or a service and save myself a lot of work.
So my question is: is there a documented JavaScript library that supports all of the above functionality?
I found a project called mymonero-core-js which appears to do what I'd need, but there doesn't seem to be any accompanying documentation (the included unit tests don't offer much information). Does this documentation exist?
There's also an offline wallet generator but it's also undocumented and kinda unwieldy (one huge file).
The game (my project), already supports Bitcoin and Bitcoin Cash using these constraints, and I've done fairly extensive work with Ethereum, smart contracts, and crypto in general (not just cryptocurrencies, I mean), so I shouldn't need much hand-holding.
Thanks muchly in advance!
P.S. It's not my intention to advertise my project so I haven't posted a link but I'll be happy to share if anyone asks.
submitted by monican_agent to Monero [link] [comments]

Blockchain in the Public Sector – Webcast Q&A

Blockchain in the Public Sector – Webcast Q&A
Link to our website: fourth webcast titled "Digital Transformation of the Public Sector & The Upcoming Legislation of Blockchain Technology in Cyprus” was an immense success. We gathered some of the best experts in the field, Deputy Minister Kyriacos Kokkinos, Jeff Bandman, Steve Tendon, and Christiana Aristidou to share their experience and discuss with us the latest updates regarding Blockchain in the Public Sector.
In its fourth series of webcasts, gathered 281 people watching the event from 41 different countries, for a two-hour webcast where guests answered participants’ questions. Following the impressive outcome and response we received from the audience,’s team has done its best to address all the questions for which public information is available.
Below is a list of the questions that were made and were not answered due to time constraints during the webcast. For the remaining questions from our audience, the team will reach out to our distinguished guests to receive their comments and feedback. Please note, that the below information is only for informational purposes!
Question 1:
How can asset tracing be accomplished with bitcoins and cryptocurrency? And how can this be regulated? Team Answer:
Digital Asset tracing may be accomplished with cryptocurrency intelligence solutions such as Cipher Trace and the ICE cryptocurrency intelligence program. FATF (Financial Action Task Force) embarked on a program of work from summer 2018 to June 2019 to strengthen and update the provisions dealing with virtual assets and virtual asset service providers. FATF updated Recommendations in October 2018 and Guidance in June 2019 include several new obligations that apply to VASPs. The so-called “Travel Rule” FATF announced in October 2019 agreed on the assessment criteria for how it will assess countries’ compliance with the new global standards. Under the Travel Rule, the transmitter’s financial institutions must include and send information in the transmittal order such as Information about the identity, name, address, and account number of the sender and its financial institution Information about the identity, name, address and account number of the recipient. The ”Travel Rule” is effectively being applied to cryptoasset transfers when there is a virtual asset service provider (VASP) involved. The scope of focus has broadened from “convertible” virtual assets to any virtual asset. Countries should make sure businesses can freeze crypto wallet or exchange accounts for sanctioned individuals.
Question 2:
Which kind of software or technical knowledge is required to develop cryptocurrency? Team Answer:
It depends on the type of cryptocurrency you wish to create, as well as the preferred functionality and features, and characteristics of the token or coin (i.e. will it be pre-mined, what type of hashing or cryptographic algorithm will be used (i.e. proof of work (POW) or proof of stake (POS) or a hybrid of both), etc. Likewise, it is useful to utilize a programming language that is broadly used and supported by a vast and active development community; more data could be found here: more information could be found here: top programming languages in 2015/2016, published by IEEE here, and TIOBE. Hypothetically, you can utilize any programming language to make cryptocurrency digital money, however, the most widely recognized are C, C++, Java, Python, Perl. The beauty of cryptocurrencies is that you can literally have access to the entire Bitcoin and Ethereum open-source programming scripts, and create your alternate coin (altcoin).
Question 3:
Hello all, I want to know about the current status of the European Union Blockchain initiative in currency or public identity. Team Answer:
Please refer to the European Services Blockchain Infrastructure (EBSI) website.
Question 4:
Mining is also the process of confirmation of transactions in the Bitcoin Blockchain. What is the process of confirmation of transactions in the Blockchain of an Organization? How do we call it? Team Answer:
That would depend on the specific consensus algorithm used for the confirmation of transactions. The consensus algorithm is part of the blockchain protocol that defines the rules on how consensus is reached on that blockchain. In order to participate, entities on the blockchain must obey and follow the same consensus algorithm. Make sure to check our glossary for more information.
Question 5:
How does a small business implement blockchain into its current non-blockchain software systems? Who do they hire to install it? Team Answer:
It is easy when there are APIs to connect the various software. For more information, you can check API.
Question 6:
What is your opinion on digitizing developing economies like India by using AI and blockchain? Team Answer:
Watch a very interesting webinar on the matter by Mr. Prasanna:
Question 7:
Blockchain technologies have been around since 2008. What would you say has been the biggest obstacle in widespread adoption? Team Answer:
In our opinion, the biggest obstacles are volatile cryptoasset prices, complicated UIs, undefined blockchain technology standards. Moreover, the legislation around the technologies is still now being developed and does not offer legal certainty for broader adoption.
Question 8:
Limitations to Blockchain Usability in the Public Sector? Team Answer:
Blockchain in the Public Sector, like any other innovative concept with big potential, cannot be a solution to every problem. Users and developers are still figuring out technological and managerial challenges. From a technological perspective, some aspects such as platform scalability, validation methods, data standardization, and systems integration must still be addressed. From a managerial point of view, the questions include business model transformation, incentive structure, and transaction scale, and maturity. Read more here.
Question 9:
How can these blockchain initiatives be practical for the African context Team Answer:
As long as the internet infrastructure is in place, these blockchain initiatives may have the same benefits for the African region.
Question 10:
What are some compelling use cases you’ve seen lately, and how do they serve to further legitimize blockchain as a solution? Team Answer:
You can see the global trends from all around the world when it comes to further legitimization as a solution, with China leading the way. Read more here.
Question 11:
How does digital currency manage the issue of money laundering? Team Answer:
Depends under which context you are looking at the term digital currency. A digital currency usually refers to a balance or a record stored in a distributed database, in an electronic computer database, within digital files or a stored-value card. Some examples of digital currencies are cryptocurrencies, virtual currencies, central bank digital currencies (CBDCs), and e-Cash. The Financial Action Task Force (FATF) is an intergovernmental body established in 1989 on the initiative of the G7 to develop policies to fight money laundering. Since 2001 FATF is also looking into terrorism financing. The objectives of FATF are to set standards and promote effective implementation of legal, regulatory and operational measures for combating money laundering, terrorist financing, and other related threats to the integrity of the international financial system. FATF is a “policy-making body” that works to generate the necessary political will to bring about national legislative and regulatory reforms in these areas. FATF monitors progress in implementing its Recommendations through “peer reviews” (“mutual evaluations”) of member countries. It is the global watchdog for anti-money laundering & counter-terrorist finance. In June 2019, it updated its guidance paper for Virtual Assets Service Providers (VASPs) regarding the transfer of digital assets. There was an insertion of a new interpretive note that sets out the application of the FATF Standards to virtual asset activities and service providers. To apply FATF Recommendations, countries should consider virtual assets as “property,” “proceeds,” “funds,” “funds or other assets,” or other “corresponding value.” Countries should apply the relevant measures under the FATF Recommendations to virtual assets and virtual asset service providers (VASPs). Read more about the FATF recommendations here).
Question 12:
To what extent can blockchain be used to improve the privacy of healthcare? team Answer:
Please refer to our previous webcast, blog, and articles for more information.
Question 13:
What is Blockchain technology in Shipping? team Answer:
The shipping sector has been in the hold of phony maritime institutes charging exorbitant fees via agents, issuing certificates to candidates who do not have the imperative attendance, or those candidates who just pay the fees for the course and ask for the certificate. In view of these fake accreditations, the possibility exists that someone could be harmed or killed, and we could face any number of potential ecological disasters. Having the option to easily verify the genuine origin of a certificate by an approved maritime center is foremost for shipping companies to fast-track their operation and streamline their labor.
Question 14:
Different uses of blockchain other than cryptocurrency? team Answer:
Please refer to our blog and glossary.
Question 15:
Upcoming trends in Blockchain concerning Advertising, Marketing, and Public Relations in the Public and Private sectors. Team Answer:
Regarding the application of blockchain technology to media copyrights, please see use case proposal during the Bloomen Ideathon.
Question 16:
How to create a decentralized blockchain? Team Answer:
An excessive number of individuals feel that blockchain is some supernatural innovation that makes up a decentralized system. In truth, this innovation only enables decentralization. Which means, it permits cryptocurrency to work in a decentralized way. Yet, it doesn’t give any guarantees that it will work that way. Along these lines, it’s really, some outer variables that decide genuine decentralization. Technology, itself never really guarantees it. That is the reason it’s a mistake to expect that if it’s a blockchain — it’s decentralized. From a technical perspective, both blockchains, centralized, and decentralized are comparative, as they take work on distributed peer to peer to network. This implies every node is individually responsible to verify and store the shared ledger. Both Blockchains utilize either a proof-of-work or proof-of-stake mechanisms to make a solitary record and they have to give upper and lower limits on the security and productivity of the system. For more information please refer to our infographic.
Question 17:
Dubai government Blockchain implementation progress? Team Answer:
You can see more information here.
Question 18:
How Blockchain and IoT can be integrated to secure data being transmitted through IoT devices. Team Answer:
You can read more about it here.
Question 19:
How can the Nigerian government use Blockchain to effectively implement its existing launched eGovernment master plan? Team Answer:
Perhaps it can draw its attention to the initiatives of Dubai, Estonia, and Malta to prepare an implementation framework.
Question 20:
What impact is blockchain going to have in today world of business especially in the financial sector Team Answer:
Please refer to our recent article titled Benefits of Blockchain Technology in the Banking Industry.
Question 21:
Is Blockchain Technology affect individuals? Team Answer:
The social effect of blockchain innovation has just started to be acknowledged and this may simply be a hint of something larger. Cryptocurrencies have raised questions over financial services through digital wallets, and while considering that there are in excess of 3,5 billion individuals on the planet today without access to banking, such a move is surely impactful. Maybe the move for cryptocurrencies will be simpler for developing nations than the process of fiat cash and credit cards. It is like the transformation that developing nations had with mobile phones. It was simpler to acquire mass amounts of mobile phones than to supply another infrastructure for landlines telephones. In addition to giving the underprivileged access to banking services, greater transparency could also raise the profile and effectiveness of charities working in developing countries that fall under corrupt or manipulative governments.
An expanded degree of trust in where the cash goes and whose advantages would without a doubt lead to expanded commitments and backing for the poor in parts of the world that are in urgent need of help. Blockchain technology is well placed to remove the possibility of vote-apparatus and the entirety of different negatives related to the current democratic procedure. Obviously, with new innovation, there are new obstacles and issues that will arise, yet the cycle goes on and those new issues will be comprehended with progressively modern arrangements. A decentralized record would give the entirety of the fundamental information to precisely record votes on an anonymous basis, and check the exactness and whether there had been any manipulation of the voting procedure.
Question 22:
As Andreas Antonopoulos often says in his MOOC: ”is a blockchain even needed?” Ie. Are there better methods? Team Answer:
In combination with nascent technologies, IoT, distributed computing, and distributed ledger technologies, governments can provide inventive services and answers for the citizens and local municipalities. Blockchain can provide the component to create a safe framework to deal with these functions. In particular, it can provide a safe interoperable infrastructure that permits all smart city services and capacities to work past presently imagined levels. On the off chance that there were better techniques, they would be researched.
Question 23:
Would any of this be also applicable to the educational sector (as part of the general public sector), and if so in which way? Team Answer:
Yes, please refer to our Webcast on Education and our blog post.
Question 24:
Will we be able to get a hold of this recording upon completion of the meeting? Team Answer:
Yes, here is a link to the recording of our webcast Blockchain in the Public Sector.
Question 25:
Was wondering if there are any existing universal framework in governing the blockchain technology? Team Answer:
The short answer is NO, as this framework is currently being prepared in collaboration with the various Member States.
We would like to thank everyone for attending our webcast and hoping to interact with you in future webinars. If you would like to watch the webinar again, then click here!
For more info, contact directly or email at [[email protected]](mailto:[email protected]).
Tel +357 70007828
Get the latest from, like and follow us on social media:
submitted by BlockDotCo to u/BlockDotCo [link] [comments]

A giant Faucet for HTML5 Canvas JavaScript

An example of a pseudo 3d effect using rectangle particles as water droplets
This is a giant Faucet for HTML5 Canvas JavaScript. With a mouse click the faucet will turn on and water particles will start pouring out until it is closed again. When it hits some vertical offset, the water will dissipate outwards with each particle getting slightly bigger as a front perspective view for a pseudo-3d effect. Particle clean-up/removal occurs when reaching the bottom canvas border to keep things running smoothly. Little mists near the spout hole are generated with random vx and vy velocity, with text indication on each side as on/off along with sound effects. The faucet image was modified using Adobe Photoshop.
A use case scenario would be a literal tongue-in-cheek faucet for said crypto-currency. The way you would dispense a set number of coins would require running a server with a full active node in Linux. Then by using a backend script such as a modified variation of bitcoinPHP, python, or nodeJS can be used to validate a user's wallet address by which a set amount can be safely sent with integrated SSL (secure socket layer) protocols via Remote Procedure Calls or RPCs. It's another fun way of 'spicing' up these kinds of projects, if that's your thing.
submitted by Chancellor-Parks to html5 [link] [comments]

⟳ 870 apps added, 78 updated at

Notice: this update is spurious, and the issue is being looked at.
⟳ from Wed, 26 Feb 2020 20:21:50 GMT updated on Sun, 01 Mar 2020 05:23:29 GMT contains 2962 apps.
Added (870)
Updated (78)
submitted by BrainstormBot to FDroidUpdates [link] [comments]

How to not get banned on Google Play

Hi to all of you fellow developers and admirers of our lord and savior Jake Wharton. Like all of you, I faced a troubling period of my life where my apps were constantly getting banned from the mighty Google Play Store. But I found the enlightenment in the following guide, which I will share with you.
Since I was previously banned from the Play Store, I had to completely change my identity to avoid being recognized by Google. I began by moving into another house in another country. Then, I legally changed my name to avoid suspicion. I subsequently browsed the Dark Web with my Tor browser running in a VM running in another Tor browser in order to buy a fake identity from a supplier in Malaysia along with fake cards. Wearing this identity, I moved again, this time to Thailand, and I currently live in a cave with no internet connection and the nearest camera is 5 miles away. I obviously changed my appearance in the process and am now a 3'11" female. I never talked to anyone during the past two years. The identity I previously assumed is officially considered dead in the United States as of last week.
Now to the app itself. My app is a random string of letters (like "lTr2x1HQuM20603cfHzV" for example, I'm not sharing the real one here) in order to avoid any kind of impersonation with another app the the store. Additionally, my app description is empty to avoid mentioning any company or product that might exist. My developer name is another random string to again avoid impersonation. My privacy policy is 989 pages long (written in Arial 4) even though my app doesn't share any user information. Instead, it aims to cover every possible case where a user might try to find me IRL and force me to take his or her information.
I don't have any ads nor any kind of in-app purchase available. Instead, I expect user to find the address of my Bitcoin wallet (by guessing since we are not allowed to provide a donation URL) in order to cover my expenses.
To avoid impersonation further, my app has no UI nor any graphic assets. There's only one screenshot in the store listing, and it's a black screen. The user must connect the phone to a computer in order to communicate with the app via ADB (the app is a terminal SMS app). My app doesn't ask for any permission. No internet, no SMS, no location, nothing. In fact, there are negative permissions asked: the user is granted permissions as a result of downloading my app. This way, when Google eventually prevents apps from asking any permissions at all, my app will be the only one left.
I am not using any third-party library to avoid wrong SDK versions leaking into my app and I check every hour if Google has released a new Android version so the SDK version is always up-to-date. My keystore has 17 backups scattered around the world and each is managed by a trusted person that can also take over my app and continue updating it in case I die. I also use App Bundle even though my app has no resources or architecture-specific binaries.
Despite having no content at all, my app is rated 18+ for adults only to accelerate publishing process and to avoid getting banned for user-generated content (even if it's impossible for users to generate content). My app is written in Kotlin and Flutter so there are no crashes possible that might get me banned. I use ?. on every call and run the whole program in try {} catch {} to avoid crashes. I am also using RxJava 3, RxAndroid, RxKotlin, ButterKnife, Retrofit, OkHTTP, timber and RxRelay. Sure I said no 3rd party but everything written by our lord and savior is obviously first-party (more like zeroth-party since arrays start at 0).
My app is licensed under WTFPL (Do What The Fuck You Want To Public License) in order to avoid any confusion. My code also doesn't use any private APIs just in case. The code was also dipped 3 times in water blessed by our lord and savior Mr. Wharton himself in order to purify it.
Finally, I have hired a team of 30 hitmen worldwide to personally track and eliminate anyone trying to add ads to my app and publish it to third party stores, or worse, to the Google Play Store itself, and get my app (the original) banned. The hitmen search the Play Store in their free time to make sure my app name, developer name and description have no letters that matches any other app's.
These are very simple instructions to follow to avoid getting banned from the Google Play Store. Trust me it's worth it considering that the other possibility is living without the sacred Play Store!
Please be aware that posting this here is a risk I've decided to take personally. I'm afraid Google might try to track the familiar movements of my computer mouse and use it to recognize my real identity, thus sentencing my app and developer account to another painful ban. So please profit as much as possible from the short amount of information I could share with you. Farewell.
submitted by rvkUJApH34uqa5Wh8M4K to mAndroidDev [link] [comments]

Tkeycoin — security, that’s what we’re betting on

Tkeycoin — security, that’s what we’re betting on
Today we will talk about the security of using the Tkeycoin platform and the TKEYSPACE mobile blockchain wallet.
Tkeycoin is a peer-to-peer payment system based on p2p principles and the concept of electronic cash. P2P technology is a fairer means of mutual settlements between users and companies around the world. Modern payment systems are imperfect and may depend on the will of high-ranking officials.
We approached the market from an economic and scientific point of view, borrowing the best from Bitcoin, Ethereum, DASH, and other alternative currencies, mixing modern concepts and building on the global experience of IBM, Microsoft and a number of other companies and research.
The Tkeycoin blockchain is protected by various mechanisms that include advanced cryptographic methods and mathematical models of behavior and decision-making. Blockchain technology prevents duplication or destruction of digital assets.
In addition to providing security and recording transactions in registers, cryptography also plays a role in ensuring the security of wallets used to store Tkeycoin. Paired public and private keys, which respectively allow users to receive and send payments, are created using asymmetric encryption or public-key cryptography. Public keys are used to generate digital signatures for transactions, which allows you to authenticate ownership of the coins being sent.
The asymmetric cryptography architecture does not allow anyone other than the owner of the private key to access funds stored in the cryptocurrency wallet, so these funds are kept safe until the owner decides to spend them.
In simple words, in the Tkeycoin peer-to-peer system, only you are the real owner of your money and only You have access to it.
Using tools such as a local Tkeycoin Core wallet or TkeySpace provides you with reliable storage, privacy, and security.
TkeySpace, in turn, adds maximum usability by combining the highest level of security and easy intuitive design.

How does TKEYSPACE provide security?

TKEYSPACE is one of the first applications that support blockchain in a mobile device and is also the first decentralized application of the TKEY platform.
Its serverless architecture provides the highest level of security for storing all assets in the application. unlike centralized applications that are managed by companies, TkeySpace does not have a Central management authority and operates in accordance with all the principles of peer-to-peer networks.
As we said above, the wallets in the blockchain have a public and private key. Centralized applications usually store users ‘private keys on their servers, which makes users’ funds vulnerable to hacker attacks or theft.
TkeySpace-stores the encrypted key only on the user’s device and in encrypted form. The encrypted key is displayed as a mnemonic phrase (backup phrase), which is very convenient for users. Unlike complex cryptographic ciphers, the phrase is easy to save or write. The backup phrase provides the maximum level of security and thanks to its usual appearance, an attacker is unlikely to ever guess what these words are and what they are for.
A mnemonic phrase is 12 or 24 words that are generated using random number entropy. If the phrase consists of 12 words, then the number of possible combinations is 2048¹² or 211³² — the phrase will have 132 security bits. To restore the wallet, you must enter the mnemonic phrase in the strict order as it was presented after generation.
And so that you do not get confused in the definitions and concepts, we will briefly describe simple and clear principles of how it all works. Let’s look briefly at the factors.

Lock Screen

The simplest thing that protects your phone from unauthorized access is Pincode, a snake, a fingerprint or a Face Id login. And it would seem that this is related to TKEYSPACE?
  • At a minimum, it is almost impossible to open new mobile devices and pick up a pin code, even in the case of theft, most often the factory settings are reset, which leads to the deletion of all data on the phone, respectively-your funds are safe even for this reason.
  • Even if there was some “craftsman” and somehow managed to change the pin code on your device, the TKEYSPACE app will automatically delete all the keys and backup phrases, the wallet will simply be empty, and the attacker will be left with nothing.
As we can see, even a simple screen lock with a pin or fingerprint protects your data. It’s not as simple a screen lock as you and I might think.
Every platform, whether it’s Android or AppStore, uses specialized key stores. Cryptography, symmetric and asymmetric encryption, keys, and certificates are directly related to this task.
Keys and certificates that are used to protect information must also be securely protected. Android uses Keystore, a certificate and a Keystore, for this purpose.
Keystore is a specialized secret data store that is used by Java applications to encrypt, authenticate, and establish HTTPS connections.
For two-way authentication, the client and server exchange certificates, respectively, and the server and client must have a Keystore with a private/public key pair and a certificate. In other words, the Keystore is used to store keys and certificates that are used to identify the key owner (client or server).
Starting with Android 8, the encryption systems have been upgraded, the system is checked for signs of hacking at startup, and the screen lock allows you to restrict access to the device. Data encryption and the use of keys ensure the security of information when it is stored and transmitted.
In the new version of the OS — Android 9 (Pie) — the developers also added support for hardware to protect against unauthorized changes.
Android apps run in an isolated software environment that restricts access to your information to other apps. OS components are also protected, which prevents attackers from exploiting system errors for their purposes.
Android uses both hardware and software to protect users and their data. Therefore, even at the operating system level, there are a lot of security factors. Of course, if you “flash” the phone (change the factory firmware) and enable Root access, this will reduce the security of Your device, but this is more an exception than a rule and such changes are usually introduced by very experienced users.
IOS uses Keychain — a specialized database for storing metadata and confidential information. Using a Keychain is the best practice for storing small pieces of data that are critical to your apps, such as secrets and passwords. In addition to the Keychain, Apple provides a full range of maximum protection for Your device.
And so we will continue,

Passcode in the app

Now we understand that to get access to the tools, an attacker needs to hack the hardware security of the Google and Apple giants to somehow get access to the app, which is impossible.
To increase security and eliminate other risk factors, we have included an access code (secret code) in the app.
You set an additional level of security by enabling a pin code to log in to the app. The access code additionally encrypts all data stored in the app.
Just so you understand — it’s not just numbers that you enter on the screen, this combination affects the ciphers inside the app. When creating a key, a user interface element is called. when the user swipes the screen, the application receives a random set of bytes — thus, all information is additionally covered by a new layer of cryptography.
And as we said above, if you try to disable the pin code, the app will delete all the data, and the attacker will be left with nothing.
As we have already realized, only 2 of these factors provide the maximum level of security for the TKEYSPACE application.
And the most important thing is that the application runs on the blockchain, which guarantees its full Autonomous operation, data immutability, and privacy.
Generation of new addresses, absence of accounts, phone numbers, e-mail and other personal data-provides you with a social level of security, which is a huge advantage in our time.
In a world where security is based on the level of cryptography, attackers try to influence You with the human factor using social engineering, so when you use applications with accounts, phone numbers, you have more risks.
Social engineering is a method of obtaining the necessary access to information based on the characteristics of human psychology.
For example, a copy of a SIM-card has become a new tool for fraudsters, but there is no personal information in TKEYSPACE, so even such groups of fraudsters can’t get access to your funds.

You don’t have to worry about security — it’s already built into the TKEYSPACE system.

A mixed encryption system based on the principles of computational complexity, with the deterministic generation of signatures using elliptic curves, provides absolute security and safety of user funds, and reserve phrases will help you restore funds at any moment.
A mnemonic phrase is 12 or 24 words that are generated using the entropy of random numbers.
If the phrase consists of 12 words, then the number of possible combinations is 2048¹² or 211³² — the phrase will have 132 security bits. To restore the wallet, you must enter the mnemonic phrase in the strict order as it was presented after generation.
Only you and no one else has access to the phrase. When you get the key, the app has restrictions on the screenshot, and the clipboard is disabled, which protects against malicious software.
It is you, as a user, who sees the phrases, and everything in the device is encrypted, the blockchain architecture protects against hacker attacks, information forgery, and other hacks.
For those who are a bit obsessed with persecution mania, we offer a small lifehack:
Buy several USB drives, connect them to a device that does not have access to the Internet, preferably on a clean operating system, create a text file, write backup phrases there, and encrypt the USB drives with passwords.
Once again, to ensure security and easy recovery, it is enough to record backup phrases once and make several backups. you do not need to resort to an additional encryption method, because we have already done everything for you :)
submitted by tkeycoin to Tkeycoin_Official [link] [comments]

How to verify a signed message in bitcoinj?

Link to bitcoin stack exchange:

I want to verify, in Java, a signature produced with bitcoin core's signmessagewithprivkey (equivalent to the verifymessage). I noticed a bitcoinj method similar to the bitcoin core's verifymessage - org.bitcoinj.core.ECKey.verify. What follows is my implementation attempt and its test.
For testing I will generate a signature and check it in bitcoin core:
>bitcoin-cli signmessagewithprivkey $(bitcoin-cli dumpprivkey 1CwKH9PQPkFPjQagEv483FUM5ngk57L3Pp) "" H2wp/+5N2+OQwP6a5GFRbt8S+EfML1Szx4uhWPfiO0e/QcY2rZQOkLOR+unknNl4NgDWBacRRXOLjr+m53V0xic= > bitcoin-cli verifymessage "1CwKH9PQPkFPjQagEv483FUM5ngk57L3Pp" "H2wp/+5N2+OQwP6a5GFRbt8S+EfML1Szx4uhWPfiO0e/QcY2rZQOkLOR+unknNl4NgDWBacRRXOLjr+m53V0xic=" "" true 
So, signing an empty message with the RPC using the address 1CwKH9PQPkFPjQagEv483FUM5ngk57L3Pp (public key: 021c3be5fb7820c56d881ea2d02a906d87540ec8888bbe819b7abd2e39f6f6e512), produces the signature H2wp/+5N2+OQwP6a5GFRbt8S+EfML1Szx4uhWPfiO0e/QcY2rZQOkLOR+unknNl4NgDWBacRRXOLjr+m53V0xic=.
My Java implementation attempt:
import org.apache.commons.codec.binary.Hex; import org.bitcoinj.core.ECKey; import org.bitcoinj.core.Sha256Hash; import java.math.BigInteger; import java.util.Base64; public class Notebook { public static BigInteger[] ParseSig(byte[] sigBytes, int sigOff) { BigInteger r = new BigInteger( 1 ,sigBytes, sigOff, 32); BigInteger s = new BigInteger( 1, sigBytes, sigOff + 32, 32); return new BigInteger[] { r, s }; } public static void main(String[] args) throws Exception{ // Signature String signatureString = "H2wp/+5N2+OQwP6a5GFRbt8S+EfML1Szx4uhWPfiO0e/QcY2rZQOkLOR+unknNl4NgDWBacRRXOLjr+m53V0xic="; byte[] signatureBytes = Base64.getDecoder().decode(signatureString); BigInteger[] signatureRandS = ParseSig(signatureBytes, 1); ECKey.ECDSASignature signature = new ECKey.ECDSASignature(signatureRandS[0], signatureRandS[1]); // Public key String pubKeyString = "021c3be5fb7820c56d881ea2d02a906d87540ec8888bbe819b7abd2e39f6f6e512"; byte[] decodedPubKeyString = Hex.decodeHex(pubKeyString.toCharArray()); ECKey publicKey = ECKey.fromPublicOnly(decodedPubKeyString); // Message String message = "Bitcoin Signed Message:\n"; Sha256Hash messageHash = Sha256Hash.of(message.getBytes()); Sha256Hash messageDoubleHash = Sha256Hash.of(messageHash.getBytes()); // Test boolean result = publicKey.verify(messageDoubleHash, signature); System.out.println("Result: " + result); } } 
Notice that I used the salt Bitcoin Signed Message:\n before hashing the message - this is done by signmessagewithprivkey as shown here and here. The problem is the above implementation doesn't pass my test and I don't know why...
submitted by johnturtle to BitcoinBeginners [link] [comments] - A new all-in-one service to create a Bitcoin custom vanity address using a secure split key.

We would like to introduce a new all-in-one service to create a Bitcoin custom vanity address using a secure split key:

What is a custom vanity Bitcoin address?
A custom vanity Bitcoin address is an address that starts with a specific pattern of your choice. It can be your name, nickname, brand, advertising or anything you want.
For example: 1niceWALLETaddress11111111134zxLJ, 3niceWALLETaddress3333333332wJpBKz, ...

Supported Bitcoin addresses:
  1. P2PKH which begin with the number 1 (Legacy)
  2. P2SH type starting with the number 3 (Nested SegWit)

How it works?
Create a custom vanity Bitcoin address in a completely trusted and secure way without having to trust anyone but yourself.
All processes except placing an order are only offline.
Offline processes are completely executed in the client browser, no data is stored or send to anyone, only you know the key pair, the merged final key and then the paper wallet.
After you have paid for your orders, your custom vanity address will be calculated as soon as possible and the solution will be emailed to you with a split key merge instruction.
All ordered addresses are case sensitive up to 9 characters of your choice.
You can order a free trial address to be sure how it works.

What we offer?
The all-in-one service consists of:
  1. OFFLINE - Java-script client-side Bitcoin key pair generator to use a split-key in the custom vanity address order
  2. ONLINE - Order custom vanity address of your choice up to 9 characters
  3. OFFLINE - Java-script client-side Bitcoin split-key merge allows you to get the final private key for you custom vanity address
  4. OFFLINE - Java-script client-side generate a Bitcoin paper wallet after getting the final key

Supported browsers:
Google Chrome, Firefox, Microsoft Edge, Opera

For more details, see
submitted by NiceWalletAddress to Bitcoin [link] [comments]

What is Cypherium?

What is Cypherium?
Cypherium is a highly scalable and robust smart contract platform. Our hybrid design features a joint Proof-of-Work (PoW) and HotStuff (Also adopted by Facebook's Libra) consensus mechanism that can achieve thousands of transactions per second without sacrificing decentralization.
Cypherium also implements a Turing-complete virtual machine for smart contracts that runs on Java, the most widely-utilized and reliable programming language in the world. This enables us to democratize the development of smart contracts and lower the barrier to blockchain adoption for existing enterprise.


Cypherium focuses on addressing the major infrastructure deficiencies of existing public blockade chains, where scalability seems to come at the expense of decentralization to every corner of the ecosystem.
As a result, slower and more centralized block chain infrastructures have hindered the commercial adoption of distributed general ledger technologies. By providing a truly decentralized and scalable framework, combined with an accessible and intuitive user interface, Cypherium lays a comprehensive foundation for developers to create innovative applications capable of transforming the future of business, legal, and enterprise solutions. Using a hybrid consensus mechanism that utilizes both proof-of-work and HotStuff, the software is designed to achieve commercial viability by maximizing both decentralization and scalability without sacrificing one for the other.
Unlike many second and third generation block chains that abandon the original consensus mechanism without permission and trust from Satoshi Nakamoto, Cypherium builds on the valuable innovations of earlier block chains. The platform's unique consensus mechanism provides unprecedented transaction performance and contract execution time through HotStuff, while leveraging an ASIC-resistant PoW system that maintains a fully decentralized choice of nodes
Cypherium is a highly scalable & permissionless blockchain platform, with a hybrid consensus mechanism that utilizes both proof-of-work and HotStuff Byzantine fault tolerance.
The software is designed to achieve commercial viability by maximizing both decentralization and scalability, without sacrificing one for the other. Unlike many second and third generation block chains that abandon the original consensus mechanism without permission and trust from Satoshi Nakamoto, Cypherium attempts to build on the valuable innovations of earlier block chains. Cypherium's unique consensus mechanism provides unprecedented transaction performance and contract execution time through HotStuff, while leveraging an ASIC-resistant PoW system that maintains fully decentralized node choice.

Multi-Level Governance Protocol
Cypherium’s governance is composed of multiple layers, where protocol-level governance and application-level governance are separated. While the protocol layer is decentralized, it has the capacity to support centralized application layers suitable for situations that might require such measures, such as central-bank-issued digital currencies.


Distributed Version Control
Upgrading all nodes through the distributed protocol. This serves as the foundation of an adequate governance model.
Duo Sandboxs
With dual sandboxes that are custom made for smart contracts, Cypherium offers one environment for testing and another for deployment to ensure high-level platform security.
Schnorr Signature
Implemented as ED-25519, Cypherium’s digital signature mechanism is faster, smaller, and more reliable than Bitcoin's ECC algorithm.

Cypherium Official Channels
• Homepage :
• Medium :
• Kakao :
• Telegram :
• Telegram Asia :
• Twitter :
• Reddit :
• Github :
• Contact : [email protected]
submitted by criptonaut to u/criptonaut [link] [comments]

Achain Galaxy Monthly Update | March 1–31, 2020

Achain Galaxy Monthly Update | March 1–31, 2020

Achain Monthly Report

Core Development:

1. Achain 2.0 Development Progress

  • Added the “nobid” effective mechanism. The Achain network can optionally specify account names that meet the rules when creating accounts.
  • Adjusted the contract test project to adapt to the new modification and it’s 20% complete.
  • Modified the in-progress flag when the peer connection is closed.
  • Added exception handling when facilitating the handshake messages to enhance code robustness.
  • Created the “Achain-exchange” project folder and added exchange docking documents.
  • Completed Achain 2.0 offline signature java version SDK and address a generation demo.
  • Completed Achain 2.0 RPC related serialization and deserialization java version SDK.
  • Studied the basic concepts and implementation details of the hot stuff consensus algorithm.
2. Achain 2.0 browser and peripheral development progress
  • Achain 2.0 Wallet, Windows version 2.0 (Chinese), is being developed, tested, and 40% completed.
  • Achain 2.0 Wallet Mac version 2.0 (Chinese), is being developed, tested, and 40% completed.
  • Achain 2.0 Wallet, Windows version 2.0 (English), is being developed and 60% completed.
  • Achain 2.0 Wallet, Mac version 2.0 (English), is being developed and 60% completed.

Community Management:

  • The first AMA event of the Achain Galaxy in 2020 was successfully held in the English telegram group on March 18. The founder Cui Meng responded to the questions raised by the overseas users about project technology, community, market, ecosystem. He also elaborated and prospected the future development of Achain Galaxy. To read the AMA please visit:
  • Achain founder Cui Meng revealed in AMA that the recently launched ATT project on Bithumb Global will soon become another important member of the Achain Galaxy and the first European project in the Achain Galaxy. Details will be announced.
  • ATT is a top-ranking project that offers decentralized information and communication protocols. ATT, a reserve member of the Achain Galaxy, was reported by well-known domestic blockchain media outlets: Golden Finance, Bihu, and Mars Finance. The article titles include, “Does this protocol direct the future?” “How blockchain + social network will perform in the arena of data interests? ATT Provides New Solutions. A Quick Understanding of the ATT Decentralized Information and Communication Protocol”. The articles discuss the future development direction of decentralized information and communication protocols.
  • The well-known foreign blockchain media Coinspeaker and Blockmanity released the news “ATT decentralized information communication protocol” “In the Arena of Data Interests, How Will Blockchain + Social Perform? ATT Offers a New Solution”. The article affirms the potential of ATT, a member of the Achain Galaxy.
  • The well-known exchange Bithumb Global and ATT, a reserve member of the Achain Galaxy, commenced large-scale publicity in South Korea for the ATT launch and excitement quickly escalated.
  • The Achain community congratulates Galaxy member ATT which launched on Bithumb Global, the world’s largest exchange. The ATT listing on Bithumb Global shows the mainstream market’s recognition of ATT, a member of the Achain Galaxy, which has greatly promoted the growth and development of the Achain Galaxy.
  • Alliance, a well-known Korean blockchain investment institution, is very optimistic about the future direction of ATT, a member of the Achain Galaxy. Achain has signed a strategic cooperation with ATT which gives strong funding support and will localize ATT within the Korean community and support comprehensive Korean public activities.
  • Achain member Eminer prepares for the upcoming Bitcoin halving which coincides with the wet weather season which lowers the electricity price from May. Eminer contacted the authorities in preparation for the anticipated water supply and is ready to leverage the wet season to strengthen their business.
  • Achain labs will work with SlowMist Technology to conduct a security audit of the core code of the Achain 2.0 mainnet to ensure its security and each of use.
  • The improvement of the Achain 2.0 contract system will allow global developers to contribute base code on the 2.0 mainnet to develop products that will compete with popular DeFi products such as Uniswap and compound protocols. Achain Capital will also focus on this area and priority investments will be available to develop solutions.
  • Achain Galaxy team selected 4 best user questions in the AMA and distributed rewards. We appreciate users that consistently provide support. For details please visit:
submitted by yimo1985 to Achain_Official [link] [comments]

Using the Internet to Donate to Andrew Yang - Cryptocurrency, BAT, and the Brave Browser

Hi y'all,
Yesterday, I stumbled across a post on this sub that piqued my interest in alternative methods of donation. While most candidates have mentioned very little (or nothing) about cryptocurrency, Andrew Yang has a future-oriented policy outline posted on his campaign website ( As the most technologically capable candidate, it's time that we add cryptocurrency into the mix of contributions to Yang's campaign. Although crypto's relative anonymity poses a few challenges with campaign finance regulations, there is a way that we can put crypto to work legally and effectively to support Andrew.
This post will focus on the usage of the Brave browser and the associated utility token, BAT (Basic Attention Token.) Brave is a web browser developed by a team lead by the creator of JavaScript and co-founder of Firefox. The project is focused on issues such as data ownership, privacy, and security. In general, it meshes well with Yang's policies. One of the unique features of Brave is the ability to earn BAT by enabling ads. Brave blocks ads by default, but users can opt-in to receive pop-ups for relevant ads based on locally-stored browsing data. These are shown as a small notification at the edge of the screen, typically at a rate of no more than 5 per hour. For each ad shown, the user will be paid in BAT. Earned BAT are deposited into your wallet once per month, normally around the end of the first week.
After payment, there are multiple options:
Here's how to earn BAT using Brave to support Andrew:
  1. Download Brave browser. Note: There is a referral program for browser downloads. By using a referral link, the referrer will earn $7.50 after ~30 days of use by the downloader. I know that many of us here will happily pass this along to to Yang campaign! ☺️ Work together to utilize this benefit. In order to generate a referral link, you must sign up to be a Brave creator at As Reddit users, all of you are capable of signing up to be a creator!
  2. Opt-in to Brave ads following the instructions at
  3. Set up your account at Uphold. You must verify your identity using a driver's license, passport, etc. There are regulations in the US related to knowing your client that Uphold must follow. Initiate this process by clicking the Brave Rewards button > "Verify Wallet" to the right of the address bar. (It's an orange/pink/purple triangle.) This should bring you to where they will guide you through creating an account.
  4. After your account is verified on Uphold, ensure that your Brave wallet is synced with Uphold. The "Verify Wallet" text should update to say "Wallet Verified". Your earned BAT will now sync to Uphold.
  5. Once you have BAT in your Uphold wallet, there are a couple of options to get this money to Andrew:
    1. Withdraw to your bank account. You will then use the standard method for donating to Andrew Yang at Note that there will be a bit of a delay between withdrawal and funds arriving in your account. Uphold also has a 1.95% withdrawal fee.
    2. Convert to Bitcoin on Uphold and donate using This option allows you to use crypto for the entire process. This is the most "futuristic" option, but be aware that you are donating to a super PAC instead of the campaign directly. CryptoFWD is associated with u/HumanityFWD ( They have posted some background on their organization at This is a great option for anyone who has reached the legal donation maximum.
  6. Keep using the internet as normal! Earn BAT and continue to donate your rewards.
Please let me know if you have any questions! I know this reads like an ad for multiple items, but I'm really hoping that we can use this technology to continue Andrew's momentum.
  1. Download Brave browser (using a Yang supporter's referral code if possible.)
  2. Earn BAT (cryptocurrency) by viewing ads - check out this link for an example ad. You won't be stuck with unskippable 10 second videos or anything, it's basically a push notification.
  3. Convert BAT to USD and donate to Andrew OR convert BAT to BTC and donate to CryptoFWD.
submitted by --_-_____-_--__-__-- to YangForPresidentHQ [link] [comments]

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