Post Deployment Encryption Key Generation for a Fully Connected and Secure Wireless Sensor Network

In Wireless Senor Networks the use of multiple encryption keys is adopted to provide resilience against compromised encryption keys. The keys are either pre distributed or generated post deployment. Key pre distribution causes redundancy and limits scalability and link establishment. Key generation via computation requires processor intensive operations and the network might still be prone to serious consequences after a node is captured or compromised. This paper presents a key generation technique that can eliminate redundancy and key reuse, ensure link establishment, and subsequent scalability. The proposed technique provides resilience in the event of compromised nodes by localizing the impact on the network and inherently thwarts some attacks.