Identity-based Key Management Scheme with Provable Security for Wireless Sensor Networks

Key management is the basis of security in wireless sensor networks. In the key management, more attentions should be paid to the public key schemes. An identity-based key management scheme for wireless sensor networks is proposed, where the node identity is used to encrypt the key generating material. The pairwise key is generated by the material ultimately. The security of the proposed scheme is analyzed with the provable security. It is proved that our scheme is IND-ID-CPA secure against some active attacks such as tampering and impersonation. The storage and communication overheads of our scheme are low enough to fit for wireless sensor networks. Addition and revocation of the nodes with backward-security and forward-security respectively make our scheme more feasible and flexible.