With the development of society, especially information technology, the society management tends to be electronic and automatic.Personal Identification is very important in the systematic safeties.

• 随着社会的进步和发展，特别是信息技术的发展，社会管理日趋电子化、自动化，如何准确的鉴别个人身份是一个关系到系统安全的重要问题。