【摘要】 无证书强指定验证者签名,能够很好地解决传统密码体制下强指定验证者签名证书管理复杂问题和基于身份密码体制下强指定验证者签名的密钥托管问题,因此研究无证书强指定验证者签名具有重要的理论意义。提出了一个无证书强指定验证者签名方案。基于CDH(Computational Diffie Hellman)问题和CBDH(Computational Bilinear Diffie-Hellman)问题困难假定,在随机预言模型下证明了该方案对自适应选择消息攻击是存在不可伪造的,分析表明该方案具有较小的计算代价和通信代价。更多还原

【Abstract】 It has great academic significance to research certificateless strong designated verifier signature(CLSDVS)that can solve the certificate management complexity problem in traditional public key cryptosystem and key escrow problem in identity-based public key cryptosystem.We constructed a CLSDVS scheme and proved that our scheme is existentially unforgeable against adaptive chosen message attack under the assumption of the computational bilinear Diffie-Hellman problem and computational Diffie-Hellman problem in the random oracle model.Then,we analyzed the computation cost and communication cost of our scheme.更多还原