Zigbee initial secret key distribution method based on RSSI covert communication

Abstract

The invention provides a Zigbee initial secret key distribution method. The method comprises the steps that a bit string S generated randomly by a trusted node is used as priori knowledge for generating a symmetric key; the S is modulated and sent; whether transmission of a modulated data packet is completed or not is judged; if transmission is completed, a packet with all the data payloads being 0 is transmitted for representing that transmission of secret data is completed; a bit string A is randomly generated by the trusted center node, B is generated based on the A and the S, and the B is transmitted to a network access node; a data packet transmitted by the network access node is waited for, if the data packet is received, a bit string D transmitted by the network access node is received, a bit string E is obtained through the A and the D, and the trusted center node transmits the bit string E to the network access node through an E encryption network secret key. The Zigbee initial secret key distribution method is based on a covert channel, no node hardware equipment needs to be added, and the accuracy and safety are improved.

Description

technical field [0001] The invention relates to a key distribution method, in particular to a flexible, convenient and scalable initial key distribution method based on RSSI secret communication. Background technique [0002] With the rapid development of the Internet of Things, the wireless sensor network as the sensing layer of the Internet of Things has also attracted more and more attention from academia and industry. At present, the wireless sensor network has broad application prospects in the military field, environmental detection, intelligent medical care, intelligent home, industrial automation, etc., so its security issues cannot be ignored. A wireless sensor network is a multi-hop ad hoc network formed by a large number of resource-constrained wireless sensor nodes through wireless communication, and cooperates with each other to complete the data collection, transmission, and processing of the detected object. In order to ensure the privacy and integrity of net...

AI Technical Summary

Problems solved by technology

However, since the new node and the encrypted network node have no prior knowledge, it is impossible to encrypt the key when transmitting the key, and the key can only be transmitted in plain text

There is a very dangerous stage, that is, before applying for network access and formally joining the network, it is an unsafe stage. If an attacker eavesdrops on network communication, the attacker can obtain the plaintext key of the network, which will make the entire network security compromised. serious threat

Images