标准模型下的无证书指定验证者签名方案

摘要

提出一种标准模型下无证书的指定验证者签名方案.利用双线性对的性质,结合无证书密码体制与 指定验证者数字签名,解决公钥系统中指定验证者签名存在的证书管理问题,实现基于身份的密码体制中指定验证者签名的密钥托管.在标准 模型下进行验证,结果表明,该方案在假设CDH问题和CBDH问题中,能抵抗适应性选择消息攻击的存在伪造性.%This paper proposes a certificateless designated verifier signature scheme in standard model. Combining the certificateless cryptosystem with designated verifier digital signature, with the properties of bilinear pairings to solve the key escrow problem of ID-based cryptography and certificate authorities in traditional public key cryptography. Under the standard model, it proves that it is provable secure against adaptive chosen-message attack under the hardness assumptions of CDH problem and CBDH problem.