一个新的门限证实数字签名方案  

A New Threshold and Confirmer Digital Signature Scheme

作　　者：周峰[1] 王尚平[1] 王晓峰[1] 耿莉[1] 燕召将[1] 

机构地区：[1]西安理工大学理学院,西安710048

出　　处：《计算机工程与应用》2004年第21期146-148,177,共4页Computer Engineering and Applications

基　　金：国家自然科学基金项目(编号:60273089)资助

摘　　要：利用乘法秘密共享思想和RSA公钥密码算法提出了一个新的门限证实数字签名方案。新方案首次将门限数字签名和证实数字签名的功能结合起来,并且签名的证实和否认协议采用零知识证明的思想。新方案效率高,在二次剩余困难假设和RSA安全的条件下是安全的。新方案中由个参与者合作产生签名,由半可信任的第三方证实者完成签名的有效性验证,方案既能使签名方控制签名有效性的任意传播,又能防止签名方对不利签名的拒绝验证行为,有效保护验证者合法权益。新方案能应用于电子合同的公平签署。In this paper,a new threshold and confirmer signature scheme is proposed by using the idea of multiplica-tive secret sharing and famous public key cryptosystem RSA.It is the first time that threshold and confirmer are com-bined in a digital signature scheme.The idea of zero-knowledge proof also is used in the confirming and denying proto-col.The new scheme is secure under condition of intractability assumption of quadric remain and the security of RSA.In our scheme n signers generate a signature whose validity is verified by a semi-trusted third party,the confirmer who can control the diffusion of the validity of the signature and prevent the signer from denying the disadvantageous signa-ture to protect the benefit of verifier.The new scheme is efficient and can be applied to justice-subscribe of electronic contract.

关 键 词：门限签名 证实签名 零知识证明 RSA 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]