基于滑动窗口的自愈组密钥分发方案

Self-healing Group Key Distribution Scheme Based on Sliding Window

针对传统自愈组密钥分发方案存在通信次数和撤销成员数受限等问题,通过引入拉格朗日插值多项式以及结合单向哈希链的方式,提出一种基于滑动窗口的自愈组密钥分发方案.该方案在保持前后向安全性的同时,能够实现组成员撤销的匿名性.经分析表明,方案不仅解决了通信次数和撤销成员数受限的问题,且大大减少了组成员的存储量,通信开销和计算开销仅与组成员数和滑动窗口值相关.方案在保持组成员安全性的前提下,节省了组成员的资源开销,适用于组成员资源受限的动态异构网络.

Aiming at the problems of communication times and number of revoked group members restriction in traditional self-healing group key distribution scheme, this paper proposes a self-healing group key distribution scheme based on sliding window by introducing Lagrange interpolation polynomial and one-way hash chain. The scheme can realize the anonymity of group member revocation while maintaining forward and backward security. The analysis shows that the scheme not only solves the problems of communication times and number of revoked group members restriction, but also greatly reduces the storage amount of group members. The communication cost and calculation cost are only related to the number of group members and the sliding window value. Under the premise of maintaining the security of group members, this scheme saves the resource cost of group members and is suitable for dynamic heterogeneous networks with limited group member resources.