安全高效无证书有序多重签名方案

发布时间：2018-11-16 12:12

【摘要】：无证书密码体制(certificateless cryptography,CLC)将用户私钥拆分为部分私钥和秘密值,其中部分私钥由密钥生成中心(key generator center,KGC)生成,而秘密值由用户自己选定,从而解决了基于身份密码体制所固有的密钥托管问题。此外,由于用户公钥由秘密值决定,无需认证中心(certificate authority,CA)对用户的公钥证书进行管理,解决了传统密码体制的证书管理问题。有序多重签名可用于电子政务和电子商务系统实现公文的逐级审批发布,提高认证效率。将有序多重签名和无证书密码相结合,提出一种安全高效的无证书有序多重签名方案,多重签名的长度及验证时间均与签名者个数无关,是紧致的无证书有序多重签名方案。方案使用较少的双线性对且只有一个签名消息,具有较高的计算效率和通信效率。证明了方案在随机预言模型(random oracle model,ROM)下具有不可伪造性。
[Abstract]:Certificate free cryptography (certificateless cryptography,CLC) splits the user's private key into partial private keys and secret values, some of which are generated by the key generation center (key generator center,KGC), and the secret value is selected by the user himself. The problem of key escrow based on identity cryptosystem is solved. In addition, because the public key of the user is determined by the secret value, there is no need for the certificate authority,CA to manage the public key certificate of the user, which solves the problem of the certificate management in the traditional cryptosystem. Ordered multiple signatures can be used in e-government and e-commerce systems to realize the gradual approval and release of official documents and improve the efficiency of authentication. By combining ordered multi-signature with certificate-free cryptography, a secure and efficient scheme is proposed. The length and verification time of multi-signature are independent of the number of signers, so they are compact and non-certificate-ordered multi-signature schemes. The scheme uses less bilinear pairs and has only one signed message, so it has high computational efficiency and communication efficiency. It is proved that the scheme is unforgeable under the stochastic prediction model (random oracle model,ROM).
【作者单位】：中国科学技术大学计算科学与技术学院;安徽职业技术学院信息工程系;
【基金】：国家自然科学基金(61325010) 安徽省重大教学改革研究项目(2015zdjy200;2015zdjy183) 安徽省社会科学创新发展研究课题(B2015009) 安徽省高校优秀青年人才支持计划~~
【分类号】：TN918.4

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