MD5的全称是Message-digest Algorithm 5（信息-摘要算法），用于确保信息传输完整一致。在90年代初由MIT Laboratory for Computer Science和RSA Data Security Inc,的Ronald L. Rivest开发出来，经MD2、MD3和MD4发展而来。它的作用是让大容量信息在用数字签名软件签署私人密钥前被"压缩"成一种保密的格式（就是把一个任意长度的字节串变换成一定长的大整数）。不管是MD2、MD4还是MD5，它们都需要获得一
Introduction There are several payment markets that can be identified, each using specific forms of money. The business-to-consumer (B2C) payment is used in commercial activities where the merchant is paid directly by the consumer for goods or servi
DCPcrypt is an open source library of cryptographic components (encryption and hash algorithms) for Borland Delphi 4, 5, 6, C++ Builder (3?), 4, 5, 6 and Kylix 1, 2 for Linux. The idea behind DCPcrypt is that it should be possible to "drop in&q
