传感器网络中一种基于分布式更新权限的组密钥管理方案

传统网络中的组密钥管理方案一般依赖于一个长期可信的节点,由该节点存储其他所有用户的信息进行组密钥管理.与传统网络不同的是传感器网络不存在这种可信节点,而且其资源十分有限,因此传统网络中的组密钥管理方案不适合传感器网络.结合传感器网络的特性,提出一种基于分布式更新权限的组密钥管理方案DRA,DRA在组密钥更新过程中引入广播机制,并构造权限分布函数、组密钥隐藏函数及广播认证函数以实现对妥协节点的剔除(revocation)及更新信息的完整性鉴别.理论分析及仿真结果表明,方案DRA在保证安全性的同时具有较小的存储开销和通信开销,并能有效地避免孤立节点的问题.

A Group Key Management Scheme Based on Distributed Rekeying Authority in Sensor Networks

Most of the group key management schemes proposed in traditional networks rely on a reliable node.Different from the traditional networks,sensor networks don't have such reliable nodes and their resources are constrained.So all these schemes can't be used in sensor networks directly.Proposed in this paper is a group key management scheme based on the distributed rekeying authority.And a broadcast mechanism is introduced in the process of group rekeying.Furthermore,three novel polynomials are presented to revoke compromised nodes and distinguish rekeying information's integrality.Extensive analyses and simulations show that the proposed scheme can provide a high level of security,reduce communication and storage overheads,and avoid the problem of isolated nodes.