一种安全的PKI与IBC之间的双向异构数字签名方案

A securely and mutual heterogeneous digital signature scheme between PKI and IBC

为保障异构环境网络通信安全,借鉴异构签密和数字签名思想,提出了异构数字签名的概念.基于双线性Diffie-Hellman困难问题,提出了安全的公钥基础设施PKI与基于身份加密IBC之间的双向异构数字签名方案,该方案支持正确性、不可伪造性和不可否认性.基于双线性Diffie-Hellman困难问题和随机预言机模型,又提出了不可伪造性的安全证明模型,该模型包含初始化参数阶段、询问阶段和伪造阶段.基于此模型,证明了所提方案的不可伪造性.最后,对性能进行了分析,结果表明,提出方案的计算量较少.

In order to protect the security of heterogeneous environment communication,borrow the idea from heterogeneous signcryption and digital signature are put forwardt.The concept of heterogeneous digital signature is proposed,based on the bilinear Diffie-Hellman problem,a secure mutual heterogeneous digital signature scheme between public key infrastructure(PKI)and identity-based cryptography(IBC)is presented,which supports correctness,unforgeability and non-repudiation.Based on bilinear Diffie-Hellman problem and random oracle model,a security model of unforgeability analysis is given,which consists of three phases:setup,query and forge.Under this model,the proposed scheme meeting unforgeability is proved.Finally,the efficiency is analyzed,the result shows that the efficiency is better.