基于访问结构上秘密共享的自治愈群组密钥分发方案

自治愈的群组密钥分发能够在不可靠的网络中建立安全的群组会话密钥.基于用户可自行选取子秘密访问结构上的秘密共享方法,提出了一个自治愈的群组密钥分发方案,该方案能够让群组成员自行选取个人秘密信息,而不需要在群组管理员和每个群组成员之间建立安全信道.安全性分析表明,该方案是一个具有撤销能力的、保证前向保密性和后向保密性的、计算上安全的自治愈群组密钥分发方案.性能分析表明,该方案具有较小的存储开销和通信开铕.

Self-healing Group Key Distribution Scheme Based on Secret Sharing with Access Structures

Self-healing group key distribution enables group of users to establish group session keys for secure communication over an unreliable networks. Based on a secret sharing method with access structures in which each user's secret shadow is selected by the user himself, a self-healing group key distribution scheme was proposed. The scheme enables each group member's personal secret key is selected by the member himself, the group manager dose not have to distribute each member's personal secret key,no secure channel is required to be established between the group manager and each member. The security of the scheme was analyzed in a system security model, the analysis results show that it is a computational secure self-healing group key distribution scheme with revocation capability and achieves both forward and backward secrecy. Finally, the performance analysis results show that the proposed scheme has less storage cost and communication cost.