具有加权特性的门限认证加密机制

可转换的认证加密机制允许指定的接收者同时对消息进行恢复和验证.而多重认证加密机制允许签名群组的多个签名成员合作生成信息的多重认证签名密文.该文结合基于中国剩余定理的加权门限秘密共享方案,构造一种加权门限机制,进而提出了一种具有加权特性的门限认证加密机制.在该机制中,每个群成员根据重要性的不同,可以被分配一个正的整数作为权重.只有当生成签名密文的群成员的权重超过预定阈值时才能生成合法的认证密文.

Encryption Scheme for Weighted Threshold Authentication

A convertible authenticated encryption(CAE) scheme allows designated recipients to simultaneously recover and verify the message,while a convertible multi-authenticated encryption(CAME) scheme allows a signing group with multiple signers to generate a multi-authenticated signature-ciphertext on the chosen message.Motivated by the weighted threshold secret sharing scheme based on the Chinese remainder theorem,we construct a weighted threshold access structure.Furthermore,we propose a weighted threshold authenticated encryption(CWAE) scheme.In the proposed scheme,each group member is assigned a positive weight according to its significance.A subset of the group can generate the signature-ciphertext if and only if the sum of weights assigned to its members exceeds a certain threshold.