基于身份的可认证多方密钥协商方案

ID-based Authenticated Multi-party Key Agreement Scheme

三方密钥协商协议虽然比传统方案高效,但不具有认证功能且易遭受中间人攻击。文章将该协议扩展到多方,提出2个新的基于身份的密钥协商方案。方案中用于实现认证功能的签名是短签名,因此认证过程比较高效。通过引入口令进化机制,提高了安全性。新方案具有等献性、无密钥控制、已知密钥安全、抗中间人攻击等安全特性。

The tripartite key agreement protocol is more efficient than previous protocol, but it is unable to authenticate the user＇s identity and is vulnerable to man-in-the-middle attack. This paper extends it to multi-party, and proposes two ID-based key agreement schemes. The new schemes are able to authenticate the user＇s identity, and the signature to realize the function is a short signature, so the executing phase is efficient, Password evolution scheme is introduced in order to improve its security, The new schemes have many properties such as equal contribution, non-key control. against man-in-middle attack, etc.