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Bitcoin is an open-source project to develop a decentralized, peer-to-peer network that tracks and verifies transactions. Bitcoin enables payments at low cost without the need for centralized payment processors. Users broadcast digitally signed transactions, which sign over some amount of the currency to another user, to other participants on the network. Bitcoin uses a proof-of-work system to protect against double-spending and to distribute new currency.
@Anonymous : how pathetic , don't you know to use your anti virus or virustotal.com ? I'll give $100 if you can find virus on it . wEaKLing! O.o
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