Bitcoin: A peer-to-peer electronica cash system
第一遍阅读，目的，思路，做法和优势都没看懂。特别是做法。
目的：propse a system for electronic transaction without relying on trust. 思路：propose a peer-to-peer network using proof-of-work to record a public history of transactions that quickly becomes computationally impractical for an attacter to change if honest nodes control a majority of CPU power.