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  2. Bitcoin - Wikipedia

    en.wikipedia.org/wiki/Bitcoin

    The unit of account of the bitcoin system is the bitcoin. It is most commonly represented with the symbol ₿ [1] and the currency code BTC. However, the BTC code does not conform to ISO 4217 as BT is the country code of Bhutan, [57] and ISO 4217 requires the first letter used in global commodities to be 'X'. [57]

  3. Blockchain.com - Wikipedia

    en.wikipedia.org/wiki/Blockchain.com

    Blockchain.com (formerly Blockchain.info) is a cryptocurrency financial services company. The company began as the first Bitcoin blockchain explorer in 2011 and later created a cryptocurrency wallet that accounted for 28% of bitcoin transactions between 2012 and 2020. It also operates a cryptocurrency exchange and provides institutional markets ...

  4. Cryptocurrency wallet - Wikipedia

    en.wikipedia.org/wiki/Cryptocurrency_wallet

    An example paper printable bitcoin wallet consisting of one bitcoin address for receiving and the corresponding private key for spending. A cryptocurrency wallet is a device, [1] physical medium, [2] program or an online service which stores the public and/or private keys [3] for cryptocurrency transactions.

  5. 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 ...

  6. 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 ...

  7. Satoshi Nakamoto - Wikipedia

    en.wikipedia.org/wiki/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]

  8. Kraken (company) - Wikipedia

    en.wikipedia.org/wiki/Kraken_(company)

    Kraken was co-founded in 2011 by Jesse Powell, an alumnus of California State University, Sacramento with Thanh Luu and Michael Gronager. [5][6] Powell was a consultant for Mt. Gox in resolving a security issue, and began working on Kraken as a replacement anticipating its death; Gox would indeed collapse in 2014, failing security audits. [7][6 ...

  9. 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. [250] By the end of 2021, bitcoin was estimated to produce 65.4 million tons of CO 2, as much as Greece, [251] and consume between 91 and 177 terawatt-hours annually ...

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