防欺诈的动态(t,n)认证加密方案  

Dynamic(t,n) Authenticated Encryption Scheme for Cheat-Proof

作　　者：甘元驹[1] 彭银桥[1] 梅其祥[1] 

机构地区：[1]广东海洋大学信息学院,广东湛江524088

出　　处：《电子科技大学学报》2011年第2期201-203,共3页Journal of University of Electronic Science and Technology of China

基　　金：广东省科技基金(2006B501018)

摘　　要：针对已有的共享认证加密方案不能有效抵制成员欺骗,不能动态调整验证成员的门限值,以及增加或删除验证者时,系统需重新给所有验证者分配新的密钥等安全缺陷,提出了一种基于动态秘密共享和认证加密算法的具有动态调整验证者门限值的共享认证加密方案。该方案可高效检测验证者的欺诈行为;用户自己选择秘密份额,系统中心不需向用户传送任何秘密信息;当有用户加入或退出系统时,其他用户不必更改自己的密钥。此外,签名者可根据消息的重要性,动态确定验证组中参与验证的门限值。Most authenticated encryption schemes with shared verification have some security flaws. In this study, an efficient authenticated encryption scheme is designed with dynamically adjusting the threshold of the verifier group based on dynamic secret sharing and authenticated encryption algorithm. The proposed scheme has the following properties： cheating of any verifier can be detected efficiently; each participant select his secret key by himself, the system center （SC） needn＇t send any secret information to any participant; and the secret key of other participants would not change when the system accepts a new participant or fires an old participant. Moreover, a signer could adjust the threshold value of the verifier group, depending on the secure level of a message.

关 键 词：认证加密 密码学 离散对数 拉格朗日插值公式 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]