Abstract: With the development of related technology, public key cryptosystem can also be utilized to build the security mechanism of WSN. With the integration of signature and key exchange of ECC, we propose an efficient key management scheme for WSN. An analysis shows it is of high security and efficiency. It can also guarantee the connectivity and flexibility of the network. Moreover, it meets the requirement of the limited computation and storage resource of the WSN node.

Key words: ECC, sensor network, key management, digital signature, key exchange