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Retrieved "Bitcoin turns 10: The obscure technology that became a household name". 108 Decentralization and centralization Decentralization Bitcoin does not have a central authority and the bitcoin network is decentralized: 7 There is no central server, bitcoin network is peer-to-peer. 94 They are the most secure and reliable way of using the network, as trust in external parties is not required. Research produced by the. "Cryptocurrency mining operation launched by Iron Bridge Resources". As of December 2017, around 980,000 bitcoins have been stolen from cryptocurrency exchanges.