Method for scanning state of adaptive wireless channel generated by shared secret key

Abstract

The invention provides a method for scanning the state of an adaptive wireless channel generated by a shared secret key. Aiming at the problem of low resource utilization ratio caused by a constant scanning speed of the traditional RSS which obtains a generated key, a controller containing a corresponding relation between a channel state and a key bit generation rate expected by a user is introduced, automatic adjustment of the wireless channel scanning rate is finally realized by a feedback mechanism, so that network resources are reasonably and efficiently utilized, and the requirement of the user for key generation is simultaneously met.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to an adaptive wireless channel state scanning method with a feedback controller, which is used for efficiently and quickly generating a shared key. Background technique [0002] The shared secret key generated by cryptography has inherent defects, and its security mostly depends on the complexity of the discrete logarithm problem, which may be easily cracked by quantum computers that may appear in the future. Therefore, using the randomness of the wireless channel state to generate a shared secret key has become a new means of non-cryptographic key generation, such as Kai Zeng et al. in the literature (“Exploiting multiple antenna diversity for shared secret key generation in wireless networks,” in Proceedings IEEE INFOCOM, Mar.2010, pp.1–9.). Since the state of the wireless channel at a certain moment is strongly related to the relative position between nodes, even if a third ...

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