同余幂离散取值密码加密不可逆算算法 此算法主要用在网站对用户注册的密码加密，当黑客下载了网站保存用户注册信息的数据库时也不能算出用户的密码。-Power discrete values with more than encryption algorithms considered irreversible algorithm mainly used in Web site registered to the user password encryption, when the hacker