公开验证认证加密Ma-Chen方案的改进  

An Improvement of the Authenticated Encryption Ma-Chen Program Certificated Publicly

作　　者：魏钦冰[1] 

机构地区：[1]菏泽学院计算机与信息工程系,山东菏泽274015

出　　处：《菏泽学院学报》2007年第5期33-35,66,共4页Journal of Heze University

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。In the existing authentication and encryption program, if the signer denies his signatures to any other receiver cannot verify the honesty of the signature verification . To solve this problem, an effective public Ma -Chen proposed certification authenticated encryption schemes. But the article proved their program could not resist attacks based on the speeial one - way hash function, dishonest purposes of any information that can successfully forged signature of the signature; and then only on solving the discrete logarithm problem, and increase information on the basis of redundancy, an improvement of the program. Improvement is not only not forged, undeniable and confidential nature, and the computational complexity is much better than Ma- Chen program.

关 键 词：认证加密 离散对数问题 消息恢复 数字签名 

分 类 号：TP311.56[自动化与计算机技术—计算机软件与理论]