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  2. Bitcoin - Wikipedia

    en.wikipedia.org/wiki/Bitcoin

    Bitcoin wallets were the first cryptocurrency wallets, enabling users to store the information necessary to transact bitcoins. [85][8]: ch. 1, glossary The first wallet program, simply named Bitcoin, and sometimes referred to as the Satoshi client, was released in 2009 by Nakamoto as open-source software. [7]

  3. History of bitcoin - Wikipedia

    en.wikipedia.org/wiki/History_of_bitcoin

    History of bitcoin. Bitcoin is a cryptocurrency, a digital asset that uses cryptography to control its creation and management rather than relying on central authorities. [1] Originally designed as a medium of exchange, Bitcoin is now primarily regarded as a store of value.

  4. Satoshi Nakamoto - Wikipedia

    en.wikipedia.org/wiki/Satoshi_Nakamoto

    Satoshi Nakamoto. Satoshi Nakamoto is the name used by the presumed pseudonymous [1][2][3][4] person or persons who developed Bitcoin, authored the Bitcoin white paper, and created and deployed Bitcoin's original reference implementation. [5] As part of the implementation, Nakamoto also devised the first blockchain database. [6]

  5. Cryptocurrency - Wikipedia

    en.wikipedia.org/wiki/Cryptocurrency

    By November 2018, Bitcoin was estimated to have an annual energy consumption of 45.8TWh, generating 22.0 to 22.9 million tons of CO 2, rivalling nations like Jordan and Sri Lanka. [252] By the end of 2021, Bitcoin was estimated to produce 65.4 million tons of CO 2, as much as Greece, [253] and consume between 91 and 177 terawatt-hours annually ...

  6. Bitcoin protocol - Wikipedia

    en.wikipedia.org/wiki/Bitcoin_protocol

    A diagram of a bitcoin transfer. The Bitcoin protocol is the set of rules that govern the functioning of Bitcoin.Its key components and principles are: a peer-to-peer decentralized network with no central oversight; the blockchain technology, a public ledger that records all Bitcoin transactions; mining and proof of work, the process to create new bitcoins and verify transactions; and ...

  7. List of cryptocurrencies - Wikipedia

    en.wikipedia.org/wiki/List_of_cryptocurrencies

    A bitcoin -based currency featuring instant transactions, decentralized governance and budgeting, and private transactions. China based cryptocurrency, formerly ANT Shares and ANT Coins. The names were changed in 2017 to NEO and GAS. The underlying software is derived from that of another cryptocurrency, ZetaCoin.

  8. Blockchain - Wikipedia

    en.wikipedia.org/wiki/Blockchain

    Bitcoin and other cryptocurrencies currently secure their blockchain by requiring new entries to include proof of work. To prolong the blockchain, bitcoin uses Hashcash puzzles. While Hashcash was designed in 1997 by Adam Back , the original idea was first proposed by Cynthia Dwork and Moni Naor and Eli Ponyatovski in their 1992 paper "Pricing ...

  9. List of bitcoin companies - Wikipedia

    en.wikipedia.org/wiki/List_of_Bitcoin_companies

    bitcoin exchange [citation needed] Bitwala: 2015 Germany: Berlin: bitcoin debit card, international transfers, bitcoin wallet [2] Blockchain.com: 2011 Luxembourg: wallet provider [citation needed] Blockstream: 2014 United States: San Francisco: software [citation needed] BTC-e: 2011 Russia: bitcoin exchange Shut down by the United States ...