Shared secret key establishment method between wireless equipment based on receiving signal intensity

Abstract

The invention discloses a shared secret key establishment method between wireless equipment based on receiving signal intensity. The method comprises the steps that 1) a security isolation environment is created for two sets of wireless equipment; 2) initiation equipment transmits multiple authentication requests to response equipment according to the set transmitting power and the set time interval; 3) the response equipment calculates the standard deviation of the receiving signal intensity; and if the standard deviation of the receiving signal intensity is less than a threshold value, an authentication passing message is replied to the initiation equipment, or authentication is not passed; 4) the initiation equipment generates a secret key K of which length is m bits, and then transmits m data packets to the response equipment; 5) the response equipment records the signal receiving intensity of the m data packets and recovers a secret key K' of which length is m bits according to m receiving signal intensity, and then replies a message encrypted by the secret key K'; and 6) the initiation equipment performs decryption by using the secret key K, and replies an authentication success message if decryption is successful so that secret key sharing is completed. Communication security is greatly enhanced by the shared secret key establishment method between the wireless equipment based on the receiving signal intensity.

Description

technical field [0001] The invention belongs to the technical field of information security, and relates to a method for establishing a shared key for wireless devices, in particular to a method for establishing a shared key between wireless devices based on received signal strength. Background technique [0002] The establishment of a shared key between wireless devices is the first step in wireless encrypted communication. The typical types of shared key establishment techniques include the method of presetting the shared key and the shared key establishment mechanism based on public key cryptography. Among them, the method of presetting the shared key is suitable for conveniently establishing a shared key between wireless devices that are uniformly manufactured and deployed, but not suitable for wireless networks with flexible structures such as mobile ad hoc networks, especially A shared key is established between two unfamiliar wireless devices. [0003] The shared ke...

AI Technical Summary

Problems solved by technology

However, one of the shortcomings of the existing device authentication technology and shared key establishment technology based on wireless channel characteristics is that it has poor applicability to static environments, and it will suffer from identity forgery or eavesdropping attacks in static environments.

Images