DES算法程序编程介绍，便于使用者了解其加密原理，更好地为系统安全服务。-DES algorithm programming, user-friendly understanding of its encryption theory, a better system for security services.

把动态口令技术和数字签名技术的原理相结合，提出了一种新的基于数字签名技术的动态身份认证系统-Put dynamic password and digital signature technology, the principle of combining a new digital signature technology based on the dynamics of identity authentication system