关键词: 交换协议, 口令认证, 双向认证, 标准模型, 无证书密钥封装

Abstract:

To guarantee the security of exchange protocol, a novel passwordauthenticated key exchange protocol without random oracle model was introduced. Clients’ identity information was delivered by the certificateless key encapsulation mechanism. The security of the proposed protocol was proved in the standard model based on decision DiffieHellman (DDH) assumption. Security analysis showed that the provided protocol was forward security and achieved mutual authentication, which could resist multiple attacks.

Key words: certificateless key encapsulation, mutual authentication, password authentication, exchange protocol, standard model