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• 1982 ·Ecash
• 1989 DigiCash9
• 1998 DigiCash Ecash
• · “Bit gold”Proof-
of-work system
Byzantine-resilient peer-to-peer
• “b-money” ·“hashcash” · “hashcash”
“RPOW”
• 2008 11 1
Bitcoin: A Peer-to-Peer Electronic Cash System
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“Bit gold”
• 2009 1 4——“ ”
Genesis block
• 1 11 0.1
• 1 1210 “RPOW” ·
• 2010 5 22
Laszlo Hanyecz10000
252016 5 1
449
• 2011 2 9 MtGox1BTC 1USD
• 4 1 8 “ ”Namecoin
• 2012 2 Bitcoin Magazine
• 2013 5 Coindesk
• 2013 11 7 Bitcoin – The Internet of Money AngelList Navel
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• Digital Signatures – these can’t be forged and allow one party to securely verify a transaction with another.
• Peer-to-Peer networks, like BitTorrent or TCP/IP – difficult to take down and no central trust required.
• Proof-of-Work prevents users from spending the same money twice, without needing a central authority to distinguish valid from invalid transactions. Bitcoin creates an incentive for miners, who run powerful computers in the network, to validate transactions and to secure them from future tampering. The miners are paid by “discovering” new coins, and anyone with computational resources can anonymously and democratically become a miner.
• Distributed Ledger – Bitcoin puts a history of each and every transaction into every wallet. This “block chain” means that anyone can validate that a given transaction was performed.
• 2014 1 8 Eli DouradoBitcoin isn’t Money—It’s the Internet of Money
• Most of Bitcoin’s critics are making a category error. They are taking aim at Bitcoin the currency, when in fact Bitcoin is much more than a currency, in the same way that the Internet is much more than the telecommunication services that preceded it.
• 2014 1 23 Vitalik Buterin BlogEthereum: Now Going
Public
• In shor t , E thereum is a nex t -genera t ion cryptographic ledger that intends to support numerous advanced features, including user-issued currencies, smart contracts, decentralised exchange and even what we think is the first proper implementation of decentralised autonomous organisations (DAOs) or companies (DACs).
• A Next-Generation Smart Contract and Decentralized Application Platform “ ”
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• 2014 9 IBM“Adept”
• 10 IBM 2015CES
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• 2015 2 27“New product development product
delivery manager-Associate/VP”“You have an opinion on bitcoin and other
cryptocurrencies”
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CEO Jamie Dimon
• 2015 2 Timo SchlaeferCrypto Facilities Ltd
• 2015 3 Blythe MastersDigital Asset Holdings(DAH)
CEO
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API
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–Noya Chen
