一个可证安全的基于证书聚合签名方案

Secure certificate-based aggregate signature scheme

基于证书公钥密码体制是新近提出的一类新型公钥密码体制,它克服了传统公钥密码体制的证书管理问题和基于身份的密码体制固有的密钥托管问题。聚合签名是一种可将不同签名者对不同消息的签名聚合成一个单一签名的数字签名技术。利用双线性对和Computational Diffie-Hellman困难性问题提出了一个基于证书的聚合签名方案,并在随机预言机模型下证明其安全性。

Certificate-based public key cryptography overcomes the certificate management problem in traditional public key system and the key escrow problem in the identity-based public key cryptography. An aggregate signature scheme can aggregate signatures on distinct messages from distinct users into a single signature. Based on bilinear pairings and the hardness of Compu- tational Diffie-Hellman problem, a secure certificate-based aggregate signature scheme is proposed and its security is proven in the random oracle model.