新型面向授权子集环签名方案

对传统的面向个人环签名方案进行扩展,提出了一个面向授权子集的环签名方案.在方案中,签名子集首先构建一个包含其自身所有成员在内的群组,然后构建一个包含签名子集在内的群组成员的子集集合.环签名是由签名子集中的所有成员合作做出的.验证者可以验证签名是否是由子集集合中的某一个子集所做出的,却无法找出具体的签名子集.在随机问答器模型下,证明了方案是安全的.通过对方案的复杂性分析表明,签名系统是高效的.

A Novel Authorized Subsets Oriented Ring Signature Scheme

Extending the ring signature scheme for individual person,a novel ring signature scheme for general subsets of a group is proposed. In the scheme, the members of signing subset firstly construct a group including themselves, then construct a set of subsets including the signing subset,namely the authorized subsets. The signature is generated by co-operation of all members of the signing subset. The verifier can verify whether the signature is generated by one of the authorized subsets,but s/he cannot find out the detailed signing subset. The scheme is proved secure under the random oracle model.And the results of complexity analysis show that the scheme is efficient.