安全高效的无双线性对的无证书签名方案

Secure and efficient certificateless signature scheme without bilinear parings

针对现有部分无证书签名方案存在效率低和安全性不高的问题,提出一个安全高效的无证书签名方案.首先,方案未使用双线性对运算,在密钥生成时通过哈希函数加强用户公钥元素间的联系;然后,证明了在随机预言机模型下基于椭圆曲线离散对数问题对方案的不可伪造性;最后,分析了方案的无秘钥托管性、不可否认性以及前后向安全性.性能及效率分析结果表明,该方案具有更高的安全性和计算效率.

Aiming at the low efficiency and lack of security of some existing certificateless signature schemes,a secure and efficient certificateless signature scheme is proposed.Firstly,the scheme does not use the bilinear parings.It binds all the elements of the public key through the hash function in the key generation.Secondly,the unforgeability of the signature is proved in the random oracle model with assuming that the elliptic curve discrete logarithm problem holds.Finally,the keyless escrow,non-repudiation and forward-backward security of the scheme are analyzed.The experiment results show that the proposed scheme is more efficient and practical.