(In order to manage the problems of high energy consumption and low efficiency of key update in large-scale heterogeneous wireless sensor networks, a group key management scheme for heterogeneous wireless sensor networks based on topology information is proposed. The αβ key management tree is constructed by using the node and node topology information, and the structure is optimized during the generation and update of the key management tree, and then the energy consumption and update delay of the group key update are reduced. Simulation experiments show that the scheme is an efficient and scalable)
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