如何应对基于身份的签名系统中密钥泄漏的问题,是一项非常有意义的工作.为了处理这一问题,利用Dodis等人的密钥隔离机制,提出了一种基于身份的密钥隔离签名.所提出出的签名方案具有两个显著的特点:(i)满足强密钥隔离安全性;(ii)其安全性证明无须借助随机预言机模型.
It is a worthwhile challenge to deal with the key-exposure problem in identity-based signatures. To deal with this problem, this paper adopts Dodis, et al.'s key-insulation mechanism to identity-based signature scenarios, and proposes an identity-based key-insulated signature scheme. The proposed scheme enjoys two attractive features: (i) it is strong key-insulated; (ii) it is provably secure without random oracles.