王小云教授虽然已经破解了sha1，但是sha1并不是由此就垮掉了，而是向着更多元、复杂的方向去发展，本文主要介绍了sha1在电子交易中的使用。-Bruce Schneier sha1 have cracked, but not from this sha1 collapse, but toward more yuan, complicated move in the direction of development, this paper introduces the sha1 in elect

一款将十六进制串进行摘要（包括md5和sha-1），非常好用。-A string of hexadecimal for summary (including md5 and sha-1), very handy.