公平的知识签名 Fair Signature of Knowledge 李立 LI Li 1 first-author 李红达 LI Hongda 1 李宝 LI Bao 1 信息安全国家重点实验室/中国科学院研究生院 信息安全国家重点实验室/中国科学院研究生院 State Key Laboratory of Information Security/Graduate University of Chinese Academy of Sciences State Key Laboratory of Information Security/Graduate University of Chinese Academy of Sciences 针对一般的知识签名不能避免隐秘通信的发生这一问题,提出了知识签名的公平性概念,并给出了严格的定义.利用知识的公平的零知识证明,构造了一个公平的知识签名方案,最后证明了此签名方案可有效地保证公平性,从而避免隐秘通信的发生. Traditional definition of signature of knowledge can not prevent steganographic communication.To solve this problem,we introduce and formally define the notion of fairness of the signature of knowledge.We then construct a fair signature of knowledge scheme by use of fair zero-knowledge proofs of knowledge,and finally prove that this scheme indeed guarantees the fairness and can efficiently prevent steganographic communication. 知识签名 公平性 零知识证明 signature of knowledge fairness zero-knowledge proof TP309 国家重点基础研究发展计划(973)项目(2007CB311202);国家高技术研究发展计划(863)项目(2006AA01Z427) 2008-05-01 2021-04-01 5