A Signature Scheme with Non-Repudiation  

作　　者：XIN Xiangjun GUO Xiaoli XIAO Guozhen 

机构地区：[1]State Key Laboratory of Integrated Service Networks,Xidian University, Xi＇an 710071, Shaanxi, China [2]Department of Information and Computing Science,Zhengzhou University of Light Industry, Zhengzhou 450002,Henan, China

出　　处：《Wuhan University Journal of Natural Sciences》2006年第5期1249-1252,共4页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foun-dation of China (60473028) ;the Science Foundation of ZhengzhouUniversity of Light Industry(2006XJJ17)

摘　　要：Based on the Schnorr signature scheme, a new signature scheme with non-repudiation is proposed. In this scheme, only the signer and the designated receiver can verify the signature signed by the signer, and if necessary, both the signer and the designated receiver can prove and show the validity of the signature signed by the signer. The proof of the validity of the signature is noninteractive and transferable. To verify and prove the validity of the signature, the signer and the nominated receiver needn＇t store extra information besides the signature. At the same time, neither the signer nor the designated receiver can deny a valid signature signed. Then, there is no repudiation in this new signature scheme. According to the security analysis of this scheme, it is found the proposed scheme is secure against existential forgery on adaptive chosen message attack.Based on the Schnorr signature scheme, a new signature scheme with non-repudiation is proposed. In this scheme, only the signer and the designated receiver can verify the signature signed by the signer, and if necessary, both the signer and the designated receiver can prove and show the validity of the signature signed by the signer. The proof of the validity of the signature is noninteractive and transferable. To verify and prove the validity of the signature, the signer and the nominated receiver needn＇t store extra information besides the signature. At the same time, neither the signer nor the designated receiver can deny a valid signature signed. Then, there is no repudiation in this new signature scheme. According to the security analysis of this scheme, it is found the proposed scheme is secure against existential forgery on adaptive chosen message attack.

关 键 词：digital signature Schnorr signature NON-REPUDIATION 

分 类 号：TN918.1[电子电信—通信与信息系统]