【摘要】 提出了一种混合密码体制的认证和密钥交换协议。在注册阶段，用户与密钥管理中心间采用公钥密码体制建立联系，而在用户间认证及密钥交换阶段则采用对称密码体制，新协议在具有比Ｄｉｆｆｉｅ－Ｈｅｌｌｍａｎ协议有更快速度的同时取得了比Ｋｅｒｂｅｒｏｕｓ协议更高的安全性。最后，运用ＢＡＮ逻辑对该协议进行了分析。更多还原

【Abstract】 The proposed protocol uses public key technology to exchange symmetric key parameters among key distribute center and users during register phase.It then uses symmetric key technology to authenticate each other and negotiate conversation key between the communicators .Consequently,the proposed protocol is faster than the authenticated Diffie-Hellman protocol.and at the same time,more secure than the Kerberos.To validate that prorosed protocol achieves its goals,BAN logic is used to analyze it.更多还原