A Physical Layer Authentication Method Based on Exponential Average Data Augmentation

Abstract

The invention discloses a physical layer authentication method based on exponential average data enhancement. The method comprises the following steps: constructing a channel information data set of akth known node; constructing a new pseudo-channel information sample by adopting an exponential average data enhancement method; repeating the previous step to obtain a plurality of new pseudo-channel information samples; adding the plurality of obtained pseudo-channel information samples into an input sample set; constructing a label matrix as an output sample set for the input sample set afteraverage data enhancement, and then constructing a new channel information data set; repeating all the steps to obtain a training data set of Q known nodes, and adding the training data set into a total training data set; and training a classifier model by using the total training data set to complete physical layer authentication of the unknown node. According to the method, the new channel information sample is constructed from the directly extracted channel information by using an exponential weighted average method, so that more training data is obtained, enough channel information samplescan be obtained, and the authentication accuracy is improved.

Description

technical field [0001] The invention relates to edge computing security authentication access, in particular to a physical layer authentication method based on exponential average data enhancement. Background technique [0002] The physical layer authentication method has a high-security wireless authentication method that cannot be cloned because it uses the physical channel information between two entities. At the same time, the physical layer authentication is also an asymmetric authentication method. In the host-to-node authentication, it can be directly When the host extracts and identifies the channel information of the information packet received from the node, the node can hardly do any calculation and storage. It is a lightweight authentication method for the node. In some special scenarios , for example, edge computing systems are particularly applicable. [0003] Edge computing, with its near-node deployment and the characteristics of the Internet of Things being...

AI Technical Summary

Problems solved by technology

[0005] The physical layer authentication method utilizes the uniqueness of wireless channel information in space and time, and judges the user identity by comparing the similarity of channel information between consecutive frames. When there are certain requirements, it will be time-consuming. If the amount of data is insufficient, the authentication accuracy will be low, which will affect the authentication accuracy rate.

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