Symmetric key generation and distribution time sequence aiming method based on wireless channel characteristics

Abstract

The invention provides a symmetric key generation and distribution time sequence aiming method based on wireless channel characteristics. The method includes the steps of NTP clock synchronization, characteristic extraction, time format conversion and time sequence aiming. NTP clock synchronization is used for synchronizing local clocks of two key generation parties. Characteristic extraction is used for acquiring wireless channel characteristic values of the intensity, the phase and the Doppler frequency shift of received signals from a wireless communication system. Time format conversion is used for converting a standard time format into a cumulative time format. Time sequence aiming is used for enabling the channel characteristics of the two key generation parties to correspond one to one according to a time axis. The method solves the problems that the numbers of data of wireless channel characteristic sequences on two communication parties are inconsistent and the wireless channel characteristic sequences do not correspond one to one on the time axis, the matching ratio of symmetric keys in the generation process is increased, and development of the next-generation symmetric key technology is powerfully supported.

Description

technical field [0001] The invention belongs to the field of communication, and relates to a method for generating a symmetric key by utilizing the characteristics of communication signals. Background technique [0002] With the development of radio communication technology, the security requirements in the communication process are getting higher and higher. By using the characteristics of the wireless channel to generate a symmetric key, the communication parties can generate and distribute a truly random and highly secure key in real time during the communication process. This method can be used in the wireless communication data link of missile weapons and on-orbit aircraft, which greatly improves the anti-interception capability of the data link. [0003] However, there are often two problems with the channel characteristic data collected by both communication parties. First, due to the retransmission mechanism of the TCP communication protocol, even if the two partie...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a timing alignment method for symmetric key generation and distribution based on wireless channel characteristics, and to solve the problem that the data quantity of the wireless channel characteristic sequence is inconsistent between the communication parties There is no one-to-one correspondence on the time axis, which improves the matching rate in the symmetric key generation process and strongly supports the development of the next generation of symmetric key technology

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