An Improved Distributed Key Management Scheme in Wireless Sensor Networks

A distributed key management scheme and the robust continuity of group key establishment are realized in this paper. This scheme derives the concept of seed members who are responsible for the management of users' joining and revocation operations by using secret sharing techniques and Modified Blom's symmetric key establishment mechanism. Besides, a novel seed member alternation mechanism which call efficiently resist of node capture attacks and revocation attacks leaves the resources much more balanced among the sensor nodes to prolong the lifetime of WSNs. Finally, The key continuity enables all the sensors to establish and update both of the pair-wise key and group key with the same key pre-distribution information, which significantly decreases the resource consuming of key management in distributed sensor networks. By comparison, this scheme outperforms most of the existing schemes in terms of network security, key connectivity and complexity of storage as well as communication.