一类PKI-IBC的双向匿名异构签密方案

A mutual and anonymous heterogeneous signcryption scheme between PKI and IBC

匿名异构签密方案不仅可以实现异构密码环境下用户机密地传递数据,而且提供收发双方用户的隐私保护功能。分析发现,已有的双向匿名异构签密方案不满足消息的保密性,也无法保护发送者的隐私。提出了一个安全的PKI?IBC的MAHSC(双向匿名异构签密)方案,并分析了其安全性满足消息的保密性、签名的不可伪造性和发送者身份的匿名性。综合效率和安全性分析结果,所提方案具有较好的可行性。

Anonymous heterogeneous signcryption scheme can not only transfer data confidentially for users in heterogeneous cryptographic environment, but also provide privacy protection for users of both sending and receiving sides. The security of an anonymous heterogeneous signcryption scheme was analyzed and that it did not satisfy confidentiality and anonymity was pointed out. A new MAHSC(mutual and anonymous heterogeneous signcryption) scheme was proposed. It was analyzed that its security satisfied the confidentiality of messages, the unforgeability of signatures and the anonymity of sender’s identity. The results of efficiency and security analysis show that the proposed scheme is feasible.