机构地区: 山东大学网络信息安全研究所
出 处: 《山东大学学报(理学版)》 2007年第1期55-58,共4页
摘 要: 在分析Wang门限签名方案的安全性的基础上,指出了该方案中真正起作用的只是私钥的一部分.提出了一个简化方案,证明了简化方案的安全性等价于修正后的Wang方案.由于采用的基本签名方案不适合门限签名,两个方案都易受内部伪造攻击,对此给出了解决办法. Based on security analysis of Wang's threshold signature scheme, it is pointed out that only the partial private key is valid in the scheme. A simplified scheme is proposed, of which the security is equal to the one of the rectified Wang' s scheme. Both schemes are vulnerable to universal forgery by an insider attacker because their underlying signature schemes are unfit for threshold signature. Then a solution is given for this problem.
领 域: [自动化与计算机技术] [自动化与计算机技术]