Secret key generation method based on channel fingerprints and auxiliary data

Abstract

The invention discloses an end-to-end key generation method based on channel fingerprints and auxiliary data. The method comprises the steps that a sending end generates a random key; The sending endtraverses the channel characteristic data , and judges whether the data falls into a quantization interval or not; the sending end quantizes the channel characteristic data by using a zero-leakage quantization method; the sending end obtains an auxiliary data generation function, calculates an auxiliary data value and sends the auxiliary data value to the receiving end; the receiving end traversesthe auxiliary data and restores the channel characteristic data; and the receiving end judges whether the restored channel characteristic data is equal to the channel characteristic data detected bythe receiving end or not, if not, the secret key is restored directly, if yes, the secret key is restored according to the maximum likelihood algorithm, and finally the generated secret key is obtained. According to the invention, channel characteristic data processing, secret key generation and corresponding auxiliary data extraction are carried out through a corresponding algorithm, so that therandomness and consistency rate of the secret key of the end-to-end communication equipment are enhanced, and higher communication security is ensured.

Description

technical field [0001] The invention relates to the field of information security, in particular to a key generation method based on channel fingerprints and auxiliary data. Background technique [0002] Wireless communication is more and more applied to all walks of life, which brings high efficiency and convenience to people's daily life, but it is followed by security issues that need to be solved urgently. For example, wireless networks communicate through broadcasting, without clear boundaries, making it easier to eavesdrop on the content transmitted, and the location where the wireless signal arrives may also be attacked; the network structure of wireless communication is often in dynamic changes, and different network structures are different. The large size makes it difficult to make centralized decision-making and management of the generated keys; wireless communication terminals are mobile, and physical defense measures such as firewalls cannot be applied, and once...

AI Technical Summary

Problems solved by technology

However, the auxiliary data generated by the traditional fuzzy extractor is related to the key, which will leak the key information, so a new fuzzy extractor structure is urgently needed

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