文献类型：期刊文献

中文题名：改进的公开验证认证加密方案

英文题名：Improvement of Publicly Verifiable Authenticated Encryption Scheme

作者：甘元驹[1];彭银桥[1];谢仕义[1];郑小平[1]

机构：[1]湛江海洋大学信息学院,广东湛江524088

年份：2005

卷号：37

期号：3

起止页码：115

中文期刊名：四川大学学报（工程科学版）

外文期刊名：Journal of Sichuan University (Engineering Science Edition)

收录：CSTPCD、、EI(收录号：2005269184573)、北大核心2004、Scopus(收录号：2-s2.0-20544467260)、CSCD2011_2012、北大核心、CSCD

基金：国家自然科学基金资助项目(60173041)

语种：中文

中文关键词：密码学;认证加密;离散对数问题;消息恢复;数字签名

外文关键词：Computational complexity;Security of data

中文摘要：现有的认证加密方案中,如果签名者否认签名,接收者不能向其它任何验证者证实签名者的诚实性。为了解决此问题,Ma Chen提出了一个有效的公开验证认证加密方案。而文中证明了他们的方案不能抵制基于单向Hash函数的特殊攻击,即不诚实的接收者对任何消息都可成功地伪造签名者的签名;然后在只基于求解离散对数难题和对消息增加冗余度的基础上,提出了一种改进方案。改进方案不仅具有不可伪造性、不可否认性和机密性等特点,而且在计算复杂性等方面优于Ma Chen方案。

外文摘要：In the most present authenticated encryption schemes the recipient cannot prove the signer's dishonesty to any verifier if the signer denies the signature. To overcome this problem, Ma-Chen proposed an efficient authenticated encryption scheme with public verifiability. In this paper it was demonstrated that their scheme cannot resist the special forgery attack about the one-way Hash function, i.e., a dishonest recipient can easily forge valid signatures for any messages on behalf of the signer. To solve the above weakness, based on the Discrete Logarithm Problem, a secure improved scheme was proposed. This scheme can satisfy all the desired security requirements. Further, the proposed scheme is more efficient than Ma-Chen's in terms of the computation cost.