随着信息技术的迅速发展,信息安全已成为全球信息化的重大挑战。密码学是信息安全的基础,而密钥安全又是密码系统的依赖。为解决密钥的随机性同用户的记忆之间的矛盾、密钥与合法用户之间缺乏联系这两大问题,提出了基于生物特征的密钥技术。生物密钥技术的提出正好解决了这些问题,它能够使生物信-With the rapid development of information technology, information security has become a major challenge of global information. Cryptography is the base of information security, and the security of the key is dependent on the password system. In order to solve the problem of the contradiction between the randomness of the key and the user s memory, the lack of connection between the key and the legitimate users, the key technology based on biological features is proposed. Bi