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Bitcoin (abbreviation: BTC; 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.
The Bitcoin Foundation is an American organization that was formerly a nonprofit corporation. [3][1] It was founded in September 2012 in an effort to restore the reputation of Bitcoin after several scandals, and to try to promote its development and uptake. [4] .
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]
- 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...
A cryptocurrency, crypto-currency, or crypto[a] is a digital currency designed to work as a medium of exchange through a computer network that is not reliant on any central authority, such as a government or bank, to uphold or maintain it. [2] . It has, from a financial point of view, grown to be its own asset class.
Qalaherriaq (c.1834 – 1856) was an Inughuit hunter from Cape York in northwestern Greenland. Born around 1834 and baptized Erasmus Augustine Kallihirua, he was taken aboard the British barque HMS Assistance in 1850 as an interpreter during the search for Franklin's lost expedition. He guided the ship to Wolstenholme Fjord to investigate ...
A blockchain was created by a person (or group of people) using the name (or pseudonym) Satoshi Nakamoto in 2008 to serve as the public distributed ledger for bitcoin cryptocurrency transactions, based on previous work by Stuart Haber, W. Scott Stornetta, and Dave Bayer. [6]
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