不含双线性对的无证书签密方案

Certificateless Signcryption Scheme Without Bilinear Pairings

随机预言机模型下基于身份的签密方案不满足不可伪造性和可公开验证性。为此,提出一种不含双线性对的改进无证书签密方案,可解决基于身份密码体制中的密钥托管问题和传统公钥密码体制中的证书管理问题。分析结果表明,改进方案满足不可伪造性、可公开验证性、健壮性和不可否认性,适用于带宽要求较低的无线网络环境。

By analyzing the ID-based signcryption scheme in the random oracle model,it finds that it is not satisfied with unforgeability and public verifiability.This paper proposes a proved certificateless signcryption scheme without bilinear pairing,and it avoids key-escrow in the ID-based encryption system and need not use certification.Analysis result shows that improved scheme is satisfied with unforgeability,verifiability,robustness,non-repudiation,it is adaptable to the wireless network requiring lower bandwidth.