基于身份多接收者签密方案的安全性分析(英文)

Cryptanalysis of an identity-based multi-recipient signcryption scheme

基于身份多接受者签密是一种能够同时实现认证性与保密性的重要密码学工具.分析杜红珍等2009年提出的基于身份多接收者签密方案.通过模拟攻击验证了该方案不能满足信息保密性与不可伪造性的安全要求.在此基础上,提出一个改进的基于身份多用户签密的方案,新方案具有保密性与不可伪造性,其效率有待进一步提高.

Identity-based multi-recipient signcryption（ID-MRSC）is an important cryptographic primitive which can simultaneously provide authenticity and privacy.In 2009,DU and WEN proposed an ID-MRSC scheme,and claimed that their scheme satisfied the security requirements of confidentiality and unforgeability.This paper analyzed the scheme and presented a concrete attack against the scheme,indicating that the scheme fails to satisfy the security requirement of unforgeability.We presented a new ID-MRSC scheme that simultaneously satisfies the requirements of confidentiality and unforgeability.It＇s efficiency could be improved is our future work.