基于信息覆盖的无线传感器网络访问控制机制

通过周期性地信息扩散,设计THC(two-hop cover)算法,使传感器节点能够在用户移动过程中及时得到用户的认证信息.基于THC算法,引入Merkle散列树和单向链等安全机制,采用分布式的访问控制模式,提出了适用于随机移动用户的传感器网络访问控制机制.分析和实验表明,本机制既适用移动用户,也适用静止用户,计算、通信、存储开销低,能够抵制节点捕获、重放、DoS等攻击.

Two-hop cover-based access control scheme for wireless sensor networks

In order to support randomly moving users, a THC (two-hop cover) algorithm and a two-hop cover-based ac-cess control scheme were proposed. The proposed algorithm made two-hop nodes be able to retrieve access control in-formation of user's in time through diffusing the information periodically. The scheme based on THC algorithm, the se-curity mechanisms of Merkle hash tree and one way chain, as well as distributed access control mode, its main contribu-tion was it supports randomly moving users for the first time. The analyses and experiments have shown that the pro-posed scheme can be applied to both mobile and stationary user and have several advantages over the current access con-trol methods of low cost in computation, communication and storage, and resistance to node capture, query replay and DoS attacks.