基于辫群的指定验证者代理签名方案

摘要

针对辫群上左右子群的可交换特性、共轭查找问题及P次根的难解性问题,提出一个基于辫群的指定验证者代理签名方案.在指定验证阶段,该方案使用验证者的私钥,使得除了指定的验证者之外,其他人都无法验证签名的合法性.实验结果表明,该方案安全有效,可以满足指定验证者代理签名的需求.%For the basic concept and important properties and difficult problems in the braid group, based on which, the designated verifier proxy signature scheme is proposed using conjugate search problem and the p-th root finding problem based on the braid group. In the designated validation period the verifier's private key is used, in addition to the designated verifier, other people cannot verify legality of the signature. Its security is analyzed and the result shows this scheme is secure and effective, and meets the nature of the designated verifier proxy signature.