Abstract: Aiming at the case of manually deployed wireless sensor networks(WSNs) , we introduced a key distribution scheme based on one-way hash chain. By employing the mechanism of key chain partly activation,our scheme can effectively weaken the threat of node capture, be resilience against node replication or node forgery. Besides of good security properties, the scheme supports node redeployment and promises good network coverage rate.

Key words: Oneway hash chain, Designated manually deployment, Node redeployment, Key distribution, Wireless sensor networks