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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 ...
Bitcoin (abbreviation: BTC; sign: ₿) is the first decentralized cryptocurrency. Based on a free-market ideology, bitcoin was invented in 2008 by an unknown entity under the pseudonym of Satoshi Nakamoto. [5] Use of bitcoin as a currency began in 2009, [6] with the release of its open-source implementation.
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. [260] By the end of 2021, bitcoin was estimated to produce 65.4 million tons of CO 2, as much as Greece, [261] and consume between 91 and 177 terawatt-hours annually ...
Prior to the release of bitcoin, there were a number of digital cash technologies, starting with the issuer-based ecash protocols of David Chaum and Stefan Brands. [3] [4] [5] The idea that solutions to computational puzzles could have some value was first proposed by cryptographers Cynthia Dwork and Moni Naor in 1992.
The first chart depicts the five-year price history of Bitcoin and the SPDR S&P 500 ETF Trust (NYSEMKT: SPY), an exchange-traded fund (ETF) that performs in accordance with the S&P 500, which ...
Satoshi Nakamoto message embedded in the coinbase of the first block. Nakamoto said that the work of writing bitcoin's code began in the second quarter of 2007. [9] On 18 August 2008, he or a colleague registered the domain name bitcoin.org, [10] and created a web site at that address.
split from Bitcoin Cardano: Sep 27, 2017 Charles Hoskinson and Jeremy Wood ADA DPoS: Yes No No Probabilistic UTXO [1] [11] [12] TRON: Jun 24, 2018 TRON DPoS: Yes No [1] [13] Tezos: Jun 30, 2018 Arthur and Kathleen Breitman XTZ PoS: Yes No [1] [14] Bitcoin SV: Nov 2018 BSV PoW: Yes (scripts) No split from Bitcoin Cash, itself split from Bitcoin [1]
The first hard fork splitting bitcoin happened on 1 August 2017, resulting in the creation of Bitcoin Cash. The following is a list of notable hard forks splitting bitcoin by date and/or block: Bitcoin Cash: Forked at block 478558, 1 August 2017, for each bitcoin (BTC), an owner got 1 Bitcoin Cash (BCH)