Bitcoin is a worldwide cryptocurrency and digital payment system invented by an unknown programmer, or a group of programmers, under the name Satoshi Nakamoto. It was released as open-source software in 2009. The system is peer-to-peer, and transactions take place between users directly, without an intermediary.These transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain. Since the system works without a central repository or single administrator, bitcoin is called the first decentralized digital currency.
Bitcoin Cash is a hard fork of the cryptocurrency bitcoin. The fork occurred on August 1, 2017. On July 20, 2017, the bitcoin miners voted, 97% in favor, on the Bitcoin Improvement Proposal (BIP) 91. The proposal, by Bitmain Warranty engineer James Hilliard, was to activate Segregated Witness
Litecoin (LTC) is a peer-to-peer cryptocurrency and open source software project released under the MIT/X11 license. Creation and transfer of coins is based on an open source cryptographic protocol and is not managed by any central authority. While inspired by, and in most regards technically nearly identical to Bitcoin (BTC), Litecoin has some technical improvements over Bitcoin, and most other major cryptocurrencies, such as the adoption of Segregated Witness, and the Lightning Network
Dogecoin (DOGE) is a cryptocurrency featuring a likeness of the Shiba Inu dog from the "Doge" Internet meme as its logo.Introduced as a "joke currency" on 8 December 2013, Dogecoin quickly developed its own online community and reached a capitalization of US$60 million in January 2014; as of June 2017, it has a capitalization of US$340 million.
BlackCoin is a peer-to-peer cryptocurrency. BlackCoin uses a proof-of-stake system and is open-source.BlackCoin was created by the developer Rat4, with the goal of proving that BlackCoin’s way of disabling proof-of-work is stable and secure.BlackCoin secures its network through a process called "minting". Transactions in BlackCoin were called "significant" in a Citibank whitepaper.
Primecoin (Ψ;XPM) is a peer-to-peer open source cryptocurrency that implements a unique scientific computing proof-of-work system.Primecoin's proof-of-work system searches for chains of prime numbers. Primecoin was created by a person or group of people who use the pseudonym Sunny King. This entity is also related with the cryptocurrency Peercoin.The Primecoin source code is copyrighted by a person or group called “Primecoin Developers”, and distributed under a conditional MIT/X11 software license.