身份基代理签密方案的密码学分析

Cryptographic Analysis of Identity-Based Proxy Signcryption Scheme

为了更好地探究代理签密方案的安全性,本文对一个适用于云数据共享的身份基代理签密方案进行了密码学分析。通过使用代理者与某些第三方合谋的内部攻击方法,对原方案进行了保密性攻击。该攻击表明原方案是不安全的,不能应用在云数据共享的安全通信中。

In order to better explore the security of proxy signcryption scheme,this paper makes a cryptographic analysis of an identity based proxy signcryption scheme suitable for cloud data sharing.By using the internal attack method of collusion between the agent and some third parties,the confidentiality attack is carried out on the original scheme.The attack shows that the original scheme is insecure and can not be applied to the secure communication of cloud data sharing.