一个前向安全的基于签密的密钥协商协议*

安全有效地传递信息是计算机安全通信研究领域的主要目标。借鉴Zheng和张串绒将签密技术运用到密钥协商协议中的思想，利用基于身份的签密方案，提出一种具有前向安全性的密钥协商协议。该协议在具有基于身份的公钥密码体制特点的同时，又拥有签密技术的优点。与已有的方案相比，该密钥协商协议除了具有机密性、认证性、还具有前向安全性的特点。

Forward secure key agreement protocol based on signcryption

Secure and efficient message delivery is one of the major aims of computer and communication security research. Based on the key agreement protocols using signcryption proposed by Zheng and Zhang chuan-rong, this paper proposed a forward secure key agreement protocol based on identity-signcyption. It combined the advantages of the identity-based public key system and signcryption technique. As compared to the existing schemes, the protocol is not only confidential, authenticated, but also forward secure.