【摘要】 在(m,n)门限方案中,如果有欺骗者提供错误的分享秘密,那么重构共享秘密的过程将失败。欺骗识别协议使得诚实的用户在重构共享秘密时能够发现欺骗行为,并找出欺骗者。在目前已经提出的多个欺骗识别协议中,Wu-Wu协议是一个比较常用,步骤比较简单的协议,其安全性依赖于一个单向hash函数。通过在Wu-Wu协议的基础上引入离散对数,增加随机参数,设计了一个新的欺骗识别协议,该协议在安全强度、抵抗重放攻击、可重用性三方面对Wu-Wu协议有了实质的改进。更多还原

【Abstract】 If there are some cheaters who submitted wrong shadows of secret in a(m,n)threshold scheme ,the process of reconstructing secret will fail.Cheating detection and cheater identification protocols will execute a series of steps to de-tect cheating and to identify cheater.Wu-Wu scheme is a simple and clear protocol in all of these protocols which have been introduced so far,and its security is based on one-way hash functions.An efficient cheating detection and cheater identification scheme based on discrete logarithms and one-way hash functions is proposed in this article.Con trasted with Wu-Wu scheme ,this scheme has an essential improvement in security,resisting replay attack and multi-using.更多还原