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A secure authentication scheme based on SNR of optical fiber communication channel

机译：A secure authentication scheme based on SNR of optical fiber communication channel

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摘要

In order to improve the physical layer authentication security, a novel scheme based on the dynamic characteristics of optical channels is proposed. By constructing a loop-back fiber link, the authenticating party can extract the dynamic characteristics of the entire fiber channel. By calculating the rate of the change of signal-tonoise ratio (SNR) with the methods such as channel feature extraction and quantitative noise reduction, the SNR as the key index of optical fiber physical layer authentication can accurately reflect the dynamic characteristics of the channel. In this article, Eve performs simulated attacks on the system from different distances, splitting ratios, and introducing additional noise to test the security authentication effect. The results show that by setting an appropriate threshold, the authentication effect is good with the detection probability PPD close to 100 and the false alarm rate PFAR close to 0. At the same time, the convenience and high speed of measuring SNR means its high popularization and economic benefits.

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