【摘要】 对一个基于E lGamal体制的结构化多重数字签名方案进行了进一步扩展,提出了一种适用于各种复杂签名结构的改进方案。分析并指出了原方案中存在的内部成员串通进行欺诈抵赖等不安全情况,在改进方案中通过增加签名管理中心和时间戳改善了安全性。更多还原

【Abstract】 To improve the original structured multi-signature scheme based on ElGamal system,a new scheme was presented,which was more generalized and can be applied to all kinds of signing structures.The original scheme was analyzed and the insecure cases,such as conspiracy of inner members to cheat or deny,were pointed out.The improved scheme solves these problems by adding a signature-centre and a time-stamp.更多还原