基于NTRU公钥密码体制的可认证同态密钥协商协议

Authenticated homomorphism key agreement protocol based on NTRU public key cryptosystem

分析了常见的密钥协商协议,基于同态加密机制和NTRU公钥密码体制,提出了基于NTRU的可认证同态密钥协商协议.该协议建立的会话密钥是可认证的、等献的和前向保密的.和基于其他公钥密码体制的密钥协商协议相比,所提出的密钥协商协议的效率和安全性都有所提高.使用改进的BAN逻辑对协议进行形式化分析,证明了协议的安全性.

This paper analyzed the common key agreement protocol. Based on the homomorphic encryption mechanism and NTRU Public Key Cryptosystem, the authenticated homomorphism key agreement protocol based on NTRU Public Key Cryptosystem was presented. The session key created by the that protocol was authentica- ted, contributory and forward secrecy. Compared with the key agreement protocol based on the other public key cryptosystem,it has better security and efficiency. The improved BAN logic was used to analyze the protocol for- mally, and the security of the protocol was proved.