Abstract
Physical layer authentication is an important way to ensure the security of optical communication network. We hereby propose a scheme to realize it by measuring the variation of the bit error rate (BER) on both sides of communication. In this scheme, the legitimacy of the receiver is identified by analyzing the BER variation of the optical fiber loop based on the short-term correlation of the channels. We then simulate a 16 PSK optical transmission system with intensity modulation direct detection-orthogonal frequency division multiplexing (IMDD-OFDM). The authentication effect is analyzed in the case of disturbance and beam split, as well as replacement of optical fiber channels caused by eavesdropper (Eve). The results show that this scheme is sensitive to the three kinds of attacks. A high probability of detection (PD) and a low false alarm rate (FAR) can be obtained. The experimental results show that with the increase of the frequency test, PD and FAR tend to be stable, and the authentication effect is better with the accuracy rate 100%.
Highlights
Optical communication networks transmit all kinds of sensitive and private information, so the security of optical transmission is increasingly important
In order to ensure the security of optical fiber communication, it is necessary to verify the identity of both parties
We propose a physical layer authentication scheme by measuring the bit error rate (BER) variation of the fiber loop channel
Summary
Optical communication networks transmit all kinds of sensitive and private information, so the security of optical transmission is increasingly important. More focuses have been put on the research of physical layer authentication based on the wireless channels which are ephemerally reciprocal and location-dependent [9]–[13]. It was put forward the authentication realized by multi-carrier transmission and fingerprint embedding [14], [15]. The unidirectional transmission of optical signals makes the authentication method of physical layer security in optical fiber channel different from that in wireless channel. X. Wang et al.: Physical Layer Authentication Based on BER Measurement of Optical Fiber Channel.
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