A random key management scheme for heterogeneous wireless sensor network

Key management is one of the most challenging security problems in wireless sensor network (WSN). A complete key management scheme should include key generation, key distribution, and key updating. Random key predistribution scheme is widely considered as the most suitable for WSN. However, network security connectivity contradicts resilience, and related research lacks key updating. To address these problems, a random key management scheme for heterogeneous WSN is proposed. Deployment knowledge is introduced into q-composite random key predistribution, and key updating mechanism is designed. Theoretical analysis and simulation show that the scheme can effectively improve network connectivity, support scalability, and ensure key effective without affecting security connectivity and resilience.