MD5 哈希算法.MD5是由国际著名密码学家、“图灵奖”获得者兼公钥加密算法RSA的创始人、麻省理工大学的RonaldRivest教授于1991年设计的。它与SHA共同构成两大哈希算法，广泛应用于金融、证券等电子商务领域。MD5输入是任意长的消息，分组长度为512比特，输出128比特。-MD5 hash algorithm. MD5 password by internationally renowned scientists, " Turing Award"　winner and founder of RSA public key encryption algorithms, MIT professor of RonaldRivest designed in 1991. With the two together constitute the SHA hash algorithm, widely used in finance, securities and other e-commerce. MD5 is a message of arbitrary length input, packet length is 512 bits, 128 bits output.