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在UC安全框架下,文中提出了一个通用的安全信道协议构造方法.按该方法得到的信道协议首先调用一个理想的密钥交换协议以取得会话密钥,然后再调用一个认证加密方案对要传送的消息进行认证加密处理.其结果是,该安全信道是UC安全的充分必要条件是,其中的认证加密方案同时是IND-CVA和INT-PTXT安全的.这一结论比IND-CCA安全和INT-CTXT安全要弱得多,显示出IND-CVA在刻画安全信道的保密安全性方面的准确性.另外,文中提出的安全信道的构造方法也实现了从安全信道的UC安全性到认证加密方案的保密性和完整性的转换,为安全信道的设计和分析提供了有力的工具.
Under the framework of UC security, this paper proposes a universal secure channel protocol construction method. The channel protocol obtained by this method first calls an ideal key exchange protocol to obtain the session key, and then calls an authentication and encryption scheme to send As a result of which the secure channel is UC-secure if the authentication scheme is both IND-CVA and INT-PTXT secure.This conclusion is more robust than IND-CCA security and INT -CTXT security is much weaker, showing the accuracy of IND-CVA in characterizing security secrecy of secure channel.In addition, the construction method of secure channel proposed in this paper also realized the security encryption from secure channel to UC The confidentiality and integrity of the conversion, for secure channel design and analysis provides a powerful tool.