An Enhanced Scheme against Node Capture Attack using Hash-Chain for Wireless Sensor Networks

摘要

Node capture is a severe threat to data security in Wireless Sensor Networks(WSNs). This paper aimed to design an enhanced and efficient scheme against node capture attack using hash-chain in wireless sensor networks. Key management is the fundamental security mechanism in wireless sensor networks, but existing schemes based on probability have poor resistance to node capture attack. In order to improve the resilience against node capture attack, a hash-chain based scheme to resist node capture attack was presented. The main idea of the proposed consisted of applying a hash function on the initial preloaded keys before deployment. During the key pre-distribution, the selected keys were hashed according to certain rules and the hashed results were as communication key. Theoretical analysis and simulation results show that, key exposal probability and average insecure degree decrease by 56 and 46% compared to existing algorithms, respectively. Through hash chain technique that conceals the same keys used to secure different links, the proposal outperforms other schemes in resilience against node capture attack and enhance the overall survivability of the network.