基于签密的认证密钥协商协议分析与改进  

Analysis and Improvement of Authenticated Key Agreement Protocol Based on Signcryption

作　　者：舒剑[1,2] 

机构地区：[1]江西财经大学电子商务系,南昌330013 [2]电子科技大学计算机科学与工程学院,成都611731

出　　处：《计算机工程》2012年第10期117-119,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(61163053)

摘　　要：针对LLH协议不能抵抗伪装攻击的问题,提出一个改进的基于签密的认证密钥协商协议。在计算性Diffie-Hellman问题假设下,利用椭圆曲线密码体制将认证与会话密钥相结合,由此实现协议的双向认证和密钥确认,增强协议的安全性。理论分析结果表明,该协议具有强安全特性,可以抵抗伪装攻击。The key establishment protocol called LLH can not resist impersonation attack.Aiming at this problem,an improved protocol based on signcryption is proposed.It uses elliptic curve cryptosystem technology under the computational Diffie-Hellman assumption,combines authentication and session key and implements the functions of mutual authentication and key confirmation,so that the security is enhanced.Theoretical analysis results show that the proposed protocol has strong security features and can be resistant to impersonation attack.

关 键 词：密钥协商 伪装攻击 签密 LLH方案 双向认证 强安全性 

分 类 号：TN918.1[电子电信—通信与信息系统]