Bitcoin (symbol: BTC) is a digital currency based on a decentralized open source, peer internet protocol. [8] It was introduced by a developer named Satoshi Nakamoto in 2009. [6] On the international front, Bitcoins can be exchanged directly with a personal computer through a file for a website or an organization without a financial intermediary. [9] In the commercial, one Bitcoin 100 million divided into smaller units called satoshis, is defined by eight decimal places. [2] Bitcoin has different behavior than the typical currency: there is not a central bank to manage and it is based on peer network of internet. The money supply is automatic, limited distribution and expected, and they are issued to the server or "Bitcoin miners" to verify Bitcoin transactions and burn them to archive the transaction log every 10 a minute. Login encoded by ECDSA digital signature and confirmed by a series of brute force processing the SHA256 hash function transforms a complex way by "Bitcoin miners." Transaction fees may apply for the new transaction is subject to the limits on the resources of the network. Every 10 minutes or a "block" (packet) the transaction log is assigned to a money supply. Amount for each package depends on the uptime of the network. Currently, 25 Bitcoin is allocated for every 10 minutes - block. It will halve 12.5 BTC in 2017 and continues to halve the next 4 years until 21 million Bitcoins in circulation on the online market in 2140. [6] [10] Bitcoin is a currency to replace the most widely used in electronic commerce. [1] [11] By November 2013, the Bitcoin monetary base is valued around $ 7 billion. [12] [13] the large fluctuations in the value of the dollar corresponds to a Bitcoin has evoked criticism about the suitability of the Bitcoin economy as currency. [14] _________________________________________________________________________________________________________________________