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Bitcoin ( abbreviation: BTC [a]; sign: ₿) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight.
- BTC, XBT
- 10−8
- Bitcoins
- ₿, (Unicode: .mw-parser-output .monospaced{font-family:monospace,monospace}U+20BF ₿ BITCOIN SIGN)
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.
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- Transactions
- Security
- Payment Verification
- Data in The Blockchain
- Alleged Criminal Activity
- See Also
A bitcoin is defined by a sequence of digitally signed transactions that began with the bitcoin's creation, as a block reward. The owner of a bitcoin transfers it by digitally signing it over to the next owner using a bitcoin transaction, much like endorsing a traditional bank check. A payee can examine each previous transaction to verify the chain...
Various potential attacks on the bitcoin network and its use as a payment system, real or theoretical, have been considered. The bitcoin protocol includes several features that protect it against some of those attacks, such as unauthorized spending, double spending, forging bitcoins, and tampering with the blockchain. Other attacks, such as theft o...
Each miner can choose which transactions are included in or exempted from a block.A greater number of transactions in a block does not equate to greater computational power required to solve that block. Upon receiving a new transaction a node must validate it: in particular, verify that none of the transaction's inputs have been previously spent. T...
While it is possible to store any digital file in the blockchain, the larger the transaction size, the larger any associated fees become. Various items have been embedded, including URLs to websites, an ASCII art image of Ben Bernanke, material from the Wikileaks cables, prayers from bitcoin miners, and the original bitcoin whitepaper.
The use of bitcoin by criminals has attracted the attention of financial regulators, legislative bodies, law enforcement, and the media. The FBI prepared an intelligence assessment, the SEC has issued a pointed warning about investment schemes using virtual currencies,and the U.S. Senate held a hearing on virtual currencies in November 2013. Severa...
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 April 1975 (age 48) (claimed), Japan (claimed)
A logo for Bitcoin, the first decentralized cryptocurrency The genesis block of Bitcoin's blockchain, with a note containing The Times newspaper headline. This note has been interpreted as a comment on the instability caused by fractional-reserve banking.: 18 A cryptocurrency, crypto-currency, or crypto is a digital currency designed to work as a medium of exchange through a computer network ...
Economics of bitcoin. Bitcoin was designed by its pseudonymous inventor, Satoshi Nakamoto, to work as a currency, but its status as a currency is disputed. [1] Economists define money as a store of value, a medium of exchange and a unit of account, and agree that bitcoin does not currently meet all these criteria.
As a cryptocurrency company, Bitcoin.com provides products, services, and information related to the purchasing, selling, storing, and using of cryptocurrencies. [1] [2] Bitcoin.com's flagship product is the Bitcoin.com Wallet, a platform for buying, selling, trading, holding, using, and managing cryptocurrencies. [3]
