适用于多方协议的可否认认证  

Deniable authentication for multi-party protocol

作　　者：陈勇[1] 鲁龙[1] 曾晟珂[1] 何明星[1] CHEN Yong LU Long ZENG Sheng-ke HE Ming-xing(School of Computer and Software Engineering, Xihua University, Chengdu 610039, China)

机构地区：[1]西华大学计算机与软件工程学院,四川成都610039

出　　处：《网络与信息安全学报》2016年第6期71-78,共8页Chinese Journal of Network and Information Security

基　　金：国家自然科学基金资助项目(No.61402376;No.U1433130);四川省高校重点实验室开放课题基金资助项目(No.SZJJ2014-078);国家科技支撑计划基金资助项目(No.2011BAH26B04);教育部春晖计划基金资助项目(No.Z2014045)~~

摘　　要：可否认认证不仅可以像数字签名那样实现消息认证,且非公开可验证性使其可以满足许多签名不能满足的需求,如隐私保护等。研究了如何在多方协议中实现完全可否认认证,利用承诺方案提出了一个适用于多方协议的可否认认证。该方案作为一种一般化的方法,能够为大多数多方协议实现可否认认证,如可否认的群密钥协商协议等,形式化了方案的敌手模型并严格证明了方案的安全性,为研究可否认认证提供了一种新思路。Deniable authentication can authenticate messages like digital signatures, and its non-public verification can meet many requirements that cannot be met by signatures, such as privacy preservation. How to achieve deni- able authentication with multi-party protocol was the study aim. A deniable authentication for multi-party protocol using string commitment scheme was proposed. As a generic method, it can pass the most of protocol to deniable protocol, such as the deniable group key agreement protocol. The adversarial model was formalized and the security was proved strictly. The research content provide a new idea for studying deniable authentication.

关 键 词：可否认认证 多方协议 承诺 安全性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]