一类可证安全的基于证书盲签名

在强安全模型下,结合基于证书签名体制和盲签名体制,提出了一类高效的基于证书盲签名方案,能抵抗适应性选择消息攻击和身份攻击下的存在性伪造,并且在随机预言模型下基于q强Diffie-Hellman难题(q-SDHP)和扩展的逆计算Diffie-Hellman难题(E-inv-CDHP)给出完整的安全性证明。结果表明,新方案具有较高的安全性,不仅简化了密钥管理过程,克服了密钥托管问题,而且整体性能比较高。

Provably secure certificate-based blind signature

Combining certificate-based signature and blind signature, this paper firstly proposed an efficient certificate-based blind signature scheme under a strong security model. The scheme was existentially unforgeable against adaptively chosen-message attack and chosen-identity attack. The complete security proof has been given under random oracle model. Its security was based on the q-strong Diffie-Hellman problem q-SDHP and the expand inversed Diffie-Hellman problem E-inv-CDHP. The results show that the new scheme has a high degree of security. It not only simplifies the certificate management process, but also overcomes the private key escrow problem. Furthermore, its overall performance is relatively high.