Enhancing the Key Pre-distribution Scheme on Wireless Sensor Networks

The communication of a wireless sensor network can be eaves dropped quite easily due to its properties, thereby requiring a security mechanism. Adding a key management scheme on the wireless sensor network is a kind of solution. This paper proposes a method to enhance the security of the existing random key pre-distribution scheme, that is considered to be suitable in wireless sensor networks. Using a little additional memory and computation, the proposed approach reduces the amount of information revealed when a sensor node is captured and thus makes a wireless sensor network that uses the random key pre-distribution scheme more secure. We analyze the proposed approaches by considering two measurements: ACL (number of additional compromised links) and AID (the average insecurity degree). ACL measures the resilience against the node capturing problem and AID measures the security of each link key. The experimental results match the analysis and show that the security of the wireless sensor network is enhanced about 50%.