Matrix type key management method for LoRaWAN

Abstract

The invention relates to a matrix type key management method for LoRaWAN, and belongs to the field of the wireless wide area network. The method comprises the following steps: generating a symmetrix matrix of the key computation by using a random number seed pool R and a line limit number M, and accomplishing the negotiation in the key establishment with the help of the existing AppEUI, AppNonce and DevNonce in the LoRa access interaction message; generating the auxiliary material required by the individual key by using the specific message content of the LoRa and the character thereof; computing by using the matrix type matrix to obtain the AppSKey and NwkSKey required by the LoRa; and realizing the key update based on the WOR function by using the specific CAD mode of the LoRa radio frequency chip. Through the method disclosed by the invention, the conflict between the improved Blom key management key and the LoRa protocol is solved, and the security of the LoRa network has a certainimprovement.

Description

technical field [0001] The invention belongs to the field of wireless wide area networks, and relates to a matrix key management method for LoRaWAN. Background technique [0002] LoRaWAN (Long Range Wide Area Network) is a network with long-distance transmission capabilities formed using special modulation and demodulation technology, developed by Semtech. Its design purpose is mainly to realize wide-area network for long-distance communication with low power consumption. [0003] LoRaWAN is mainly composed of three entities: terminals, gateways, and network servers. The LoRa protocol mainly serves application scenarios that require long-distance communication. The LoRa protocol mainly involves physical layer standards such as modulation and demodulation and MAC layer standards. In terms of network security, through a fixed pre-configured key combined with two parameters "DevNonce, the terminal generates a random number" and "AppNonce, the server generates a random number...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a kind of matrix type key management method for LoRaWAN, by introducing a kind of existing improved Blom key management scheme, improve LoRaWAN security; The configuration method and the method of calculating the negotiation information by using the content of the existing network incoming message have solved the contradiction between the protocol and the key management scheme; by introducing the radio frequency wake-up technology WOR, it is possible to wake up the class A device in deep sleep, and propose a A kind of efficient key update scheme for the present invention realizes key update

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