摘要：Based on several core factors of the wireless sensor network security model,a novel group-based key management scheme which contains a pre-shared key pool in order to confirm the network security is proposed. A new architecture of pre-distribution shared key pool filled with time-based hash functions is introduced in this scheme. A time-parameter to the key negotiation and the node’s updating process is added by the time-based hash functions. By updating the key with time and detection mechanisms, this shceme produces much better nodes for both forward scecurity and backward security.For the captured problem of the local node,a security event-based rekeying mechanism is designed in this paper. The new one-way hash key chain which is from the density key pool performs robustly in meeting the needs of key generation and update security. The theoretical analysis and simulation are done. The result justifies that the node connectivity, the node storage consumption and the anti-trapping capabilities are improved significantly.
