基于可验证秘密分享的共享验证签名方案

A signature scheme with shared verification based on verifiable secret sharing

对已有的一个 (t,n)门限共享验证签名方案进行了分析 ,发现了其安全漏洞 .这样的漏洞使得敌手可利用伪造攻击和替换攻击对验证组进行欺骗 ;利用可验证秘密分享技术 ,提出了一个基于离散对数安全的共享验证签名方案 ,该方案具有防止签名者和验证组成员欺骗的功能 .

First, an existing signature scheme with (t,n) shared verification is analyzed, and its security weak points are found. These weak points can result in the adversary to cheat the verification group by forgery and substitution attack. Next, using the techniques of verifiable secret sharing, a secure signature shceme with shared verification based on the discrete logarithm is proposed, which has a novel property that the previous signature schemes with shared verification do not have, that is, to prevent the signer and members of the verification group from cheating.