一种动态秘密共享方案的安全漏洞分析  

Analysis of Security Weak Points in a Dynamic Secret Sharing Scheme

作　　者：唐晓东[1] 王兴芳[2] 

机构地区：[1]华南师范大学电子商务系,广东广州510631 [2]华南师范大学计算机系,广东广州510631

出　　处：《计算机应用》2004年第2期15-17,共3页journal of Computer Applications

摘　　要：文中指出了文献[14]中基于椭圆曲线密码体制的动态秘密共享方案存在安全漏洞。此漏洞使得攻击者可通过公开的系统参数获取全部子秘密和秘密,从而使整个系统崩溃。另外,该方案也不能防止内部成员对其他合法成员的欺诈。文中在该方案的基础上提出了一个修正方案,它不但能有效阻止敌方窃取秘密或子秘密,也能有效地防止内部成员之间的互相欺诈。This paper points out the security weak points in dynamic secret sharing scheme based on elliptic curve cryptosystem in references. Through these weak points, attackers can get all shares and secret from public system parameters, which lead to the collapse of the whole system. In addition, this scheme cannot prevent interior members from cheating other qualified ones. Based on this scheme, a modified one is proposed that can prevent adversaries from getting the secret or shares and efficiently guard against cheating among participants.

关 键 词：秘密 子秘密 动态秘密共享 椭圆曲线的离散对数问题 欺诈 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]