Key pre-distribution scheme for WSN based on Hash mechanism

A key pre-distribution scheme based on Hash mechanism is proposed,which extends the ideas of q-composite key predistribution scheme put forward by Chan et al.Making full use of characteristics of one-way Hash function,this scheme uses the Hash function to preload the keys in the process of key pre-distribution,which efficiently hides part of the keys information stored in the nodes.The disclosure of some keys reveals only derived versions,which cannot be used to compromise other links in the network using backward keys.The simulation results show that the scheme enhances the network resiliency compared to q-composite scheme while the same secure connectivity coverage,storage and communication performance are guaranteed.