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无证书公钥密码体制和代理盲签名都因其自身的优点而成为当前学术界的研究热点,但是有的无证书的代理盲签名存在一定的安全漏洞,如攻击者能够恢复出私钥、跟踪签名信息等.本文结合代理签名和盲签名的优点,利用无证书公钥密码体制和双线性对构造了一个安全高效的代理盲签名方案.经过安全性分析,该方案满足代理盲签名的盲性、不可伪造性、可验证性、不可否认性等安全特性,能够应用于电子商务、电子政务等保护用户隐私且需要代理签名的场合,具有较高的执行效率.
Both certificateless public key cryptosystems and proxy blind signatures have become the hotspot in academic field due to their own advantages. However, some certificateless proxy blind signatures have some security vulnerabilities. For example, an attacker can recover a private key and track Signature information, etc. In this paper, a secure and efficient proxy blind signature scheme is constructed by using certificateless public-key cryptosystem and bilinear pairings based on the advantages of proxy signature and blind signature.After the security analysis, the scheme satisfies the blind-signature blind Security, verifiability, non-repudiation and other security features can be applied to e-commerce, e-government and other protection of user privacy and the need for proxy signature, with high efficiency.