一个基于身份的密钥隔离认证密钥协商协议

ID-based key-insulated authenticated key agreement protocol

鉴于目前已有的基于身份的认证密钥协商协议都未考虑后向安全性,结合密钥进化的思想,利用椭圆曲线加法群提出了一个基于身份的密钥隔离认证密钥协商协议。协议去除了双线性对运算,效率比基于双线性对构造的基于身份的协议有较大提高;协议不仅满足目前已知的所有针对认证密钥协商协议的安全性要求,而且还满足后向安全性。

In view of the absence of backward security in all existing identity-based（ID-based） authenticated key agreement protocols, this paper proposed an ID-based key-insulated key agreement protocol from additive elliptic curve group by incorpo- rating the idea of key evolution. Comparing with existing works, this protocol eliminated the pairing operation and thus outper- formed the pairing-based ID-based authenticated key agreement protocol. Furthermore, this protocol enjoys both of the known security requirements and the backward security. To the best of author＇ s knowledge, this is the first ID-based key-insulated au- thenticated key agreement protocol in the literature.