摘要： 设计一种能够提供PKG前向安全的基于身份的认证密钥协商协议，在标准模型中证明其具有已知密钥安全、完美前向安全、抗密钥泄露伪装攻击等安全特性。该协议的安全性建立在BDDH假设的基础上，与安全性建立在其他困难问题基础上的同类协议相比，其运算效率相当，安全性更高。

关键词: 认证密钥协商协议, 基于身份的加密方案, 双线性对, 标准模型

Abstract: This paper designs an identitybased authenticated key agreement protocol with perfect forward security of Private Key Generator(PKG). It is proved to provide known key security, forward secrecy, keycompromise impersonation and so on in standard model. Its security is based on Bilinear Decisional DiffieHellman(BDDH) assumption, so its security is higher than the protocols based on the weaker assumption.

Key words: authenticated key agreement protocol, IdentityBased Encryption(IBE) scheme, bilinear pairings, standard model

中图分类号: 

• TP309