【摘要】 最近,谢琪等人(2005)基于双密钥思想提出了一种多秘密共享认证方案。在他们方案的秘密重构阶段,每个成员必须同时使用两个子密钥来证实自己没有欺骗。本文给出了一种攻击方法表明他们的方案并不能有效抵制成员的欺骗。同时给出了一种改进方案,不仅弥补了谢琪等人方案的安全缺陷,而且在秘密重构时采用并行算法来降低运算复杂度。更多还原

【Abstract】 Recently, Xie et al. proposed a multi-secret sharing authenticating scheme based on double secret shadow. In their scheme, the participant must use his two secret subshadows to prove his honesty in the secret reconstruction stage. This article, however, will demonstrate their scheme can not withstand the participant cheating. Finally, this article improves the Xie et al.’s scheme to overcome the weakness and reduce the computation by using parallel algorithm in secret recovery phase.更多还原