LKH++ Based Group Key Management Scheme for Wireless Sensor Network

This paper proposes a secure low-power group key management scheme based on LKH++. In our scheme, we construct a secure tree to manage group keys. The building method of key tree and holding way of keys are proposed by our scheme to reduce computation and storage overhead on each sensor node. In addition, WLKH supports rekeying to enhance network security and survivability against node capture. Performance analysis shows WLKH is highly efficient in term of security, computation and key storage.