Secure Distributed Group Key Management Scheme for MANET
Minghui Zheng · Journal of Chinese Computer Systems · 2007
Group key management is used for group members in group communication to generate, refresh and transfer keys which are used for encryption and authentication. Many mobile wireless applications for military battlefield and emergency situations depend upon secure group communications. But group key management in mobile ad hoc networks meets a great challenge because of mobility, limited power, unreliable multi-hop communication and lack of trusted center. Based on the verifiable secret sharing mechanism and threshold cryptography, a new secure distributed group key management scheme named VGK is proposed. The presented scheme can strongly resist active attacks and coalition of the adversaries, and can be robust and adaptive in a hostile environment as well as a friendly environment. Our simulation results show that, compared to the previous work, VGK is better in the group rekey success ratio and delay especially in a hostile environment.