指定验证人的(t,n)门限代理签名方案  

A (t,n) Threshold Proxy Signature Scheme with Specified Verifiers

作　　者：王晓明[1] 符方伟[2] 

机构地区：[1]暨南大学计算机系,广东广州510632 [2]南开大学数学科学学院,天津300071

出　　处：《软件学报》2005年第6期1190-1196,共7页Journal of Software

基　　金：国家自然科学基金;广州省自然科学基金;暨南大学自然科学基金~~

摘　　要：将指定验证人概念引入门限代理签名,提出了一个指定验证人的(t,n)门限代理签名方案.该方案不仅实现了门限代理签名,而且还能实现只有指定验证人一起才能验证门限代理签名的特性.在普通的门限代理签名方案中,任何人都能验证门限代理签名的有效性.然而,在某些情况下,只希望指定的验证人一起才能验证门限代理签名.这在实际中是需要的,如电子商务中的电子投标等.另外,该方案还具有在原始签名人需要时,收回某个代理签名人代理权的特性.The concept of specified verifiers is first introduced into the threshold proxy signature, and a (t,n) threshold proxy signature scheme with the specified verifiers is proposed. In the proposed scheme, any t or more proxy signers can sign a message on behalf of an original signer for the specified verifiers, and only the specified verifiers together are able to verify the validity of the proxy signature. In ordinary (t,n) proxy threshold signature schemes, anyone can verify the validity of the proxy signature. In some applications, however, it is required that a proxy signature could be verified only by the specified verifiers together, that is, no a verifier can gain an advantage of the knowledge of the validity of the proxy signature before the other verifiers know its validity (e.g. tenders, bits). Furthermore, the proposed scheme can also revoke the proxy signature right of the proxy signers delegated by the original signer if original signer needs.

关 键 词：数字签名 门限代理签名 指定验证人签名 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]