Abstract: Access control is an important application of wireless sensor networks. Previous works arc implemented by exchanging key among neighboring sensors. Considering that in many cases, an sensors behaviour is both spatially and temporally correlated, this paper proposed a distributed and localized behaviour trust mechanism based on similarity. this mechanism implements behaviour trust access control by using statistical hypothesis test for matching the reading se- quence of sensors and statistical characters of the behaviour. The simulation results show that the mechanism can reduce the network traffic, can detect as much as 93% of the not trusty sensors when 10% of sensors arc not security.

Key words: Wireless sensor network, Access control, Behaviour trust, Secure