S-TGDH, secure enhanced group management protocol in ad hoc networks

We present and analyse a secure protocol for group management, in large and dynamic ad hoc networks. The protocol we suggest relies on the TGDH protocol. In comparison with the previous solution, our algorithm helps to uniformly dispatch the group key calculus on each node, and the global cryptographic tree is optimized. Moreover, we propose an authentication algorithm. Our algorithm provides several well-known security properties, such as nodes authentication, messages freshness, passive attacks resistance and known key attack resistance.