Key management for mobile sensor networks

Key management is paramount for mobile sensor network (MSN) security. The special nature of MSNs imposes challenging requirements on key management design. We evaluate current key management techniques proposed for wireless sensor networks in the context of MSNs and identify open issues for future research. We also propose a novel approach to control and replace pool-based pre-distributed keys. The analysis in this paper shows that this approach keeps the initial connectivity and resiliency properties of the key pre-distribution scheme even when nodes and keys are revoked.