Key management method based on wireless Mesh netword

Abstract

The present invention relates to a key management method based on wireless Mesh network, which is characterized in that the method includes procedures below: As relation amongst communication nodes of a mesh cluster varies, an auxiliary updating node is selected from a key tree in correspondence with the Mesh cluster. Wherein, the key tree is provided with a ternary tree structure. A key and a blind key of the auxiliary updating node are created at random. Keys and blind keys at all key nodes in a key path of the key tree are calculated for the auxiliary updating node. Besides, all key nodes of the key tree broadcast to blind keys of all key nodes on the key path. Each leaf node of the key tree updates its own keys and blind keys and works out cluster keys. The technic proposal of the present invention provides parameters of total information length while nodes are added and leaves, password calculation quantity, total combined cluster information length and so on lower than those of prior arts, thus eliminating conflicts of safety demands of prior arts with expansibility and QoS demands.

Description

technical field [0001] The invention relates to the communication security field of wireless Mesh networks, in particular, in a wireless Mesh network with high delay peer-to-peer characteristics, the key negotiation of bilinear pairing and ternary tree are combined, and according to the Mesh group The method of updating the group key when the node relationship in the node changes. Background technique [0002] With the rapid development of wireless network technology, wireless network technology standards are constantly being updated, and new wireless network architectures and technologies are constantly being proposed. Among them, a new type of wireless network structure - wireless Mesh network appears, which This kind of wireless network is also known as a multi-hop (multi-hop) network, and its core is to make each node in the network perform the operation of sending and receiving signals. For ordinary wireless technologies in the past, the wireless network must first vis...

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Problems solved by technology

[0020] The purpose of the present invention is to address the large message length and the amount of cryptographic calculations when the existing STR protocol performs key management on the wireless Mesh network, and the defects that the system performance bottleneck and single point of failure may be caused by the structure of the STR tree

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