Journal of Theoretical and Applied Information Technology
In this paper, the authors propose a trust authority based key management and authentication technique for multicasting in ad hoc networks. Initially, they construct an energy efficient topology aware key tree which mainly aims to reduce the re-keying load by pre-processing the joining members during the idle re-keying interval. Key management is processed based upon Diffie-Hellman key pair and RSA secret public key pair. A trust authority establishes public key certificates for each group member by signing the public key with its secret key. From the simulation results they show that this key management guarantees key authentication, enhances fault-tolerance and protects the tree from impersonation attacks.