关键词: Ad hoc网络, 组密钥管理, Weil配对, 格, Opnet网络仿真软件

Abstract: Hierarchical secret sharing system is proposed based on the identity of the Ad hoc group key management scheme.Based on lattice theory，all the patch elements of the bounded distributive lattices constitute a sub-lattice.All the element and patch element are divided into ordinary node and service node in the distribution lattice.The shares held by server nodes include more information than that held by ordinary nodes.The scheme can reduce the risk of distributing key equivalently to all nodes which may lead the group key to be renewed if any K nodes are attacked.The logical structure of the scheme is a grid.This scheme not only has the advantages of high connectivity and low load，but also has high expandability.By using the network simulator Opnet simulation results show that this scheme is more efficient，secure and stronger anti-attack than traditional scheme.

Key words: Ad hoc network, group key management, Weil pairing, lattice, Opnet