On the Access Control Mechanism of Wireless Sensor Network

This paper puts forward an approach of access control based on unidirectional chain. For the purpose of increasing the number of users, improving the expandability of access ability, and resisting the attacks aiming at capturing users, the author proposes new methods of access control and a user access ability revocation based on the hash tree. Through analysis, evaluation and comparison, the author concludes that these approaches and methods require smaller computation, storage and communication overheads than the existing sensor network access control methods. Moreover, the proposed approaches and methods are able to resist node capture, as well as information replay requests and attacks.