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Based on information-theoretic security, physical-layer security in an optical code division multiple access (OCDMA) system is analyzed. For the first time, the security leakage factor is employed to evaluate the physicallayer security level, and the safe receiving distance is used to measure the security transmission range. By establishing the wiretap channel model of a coherent OCDMA system, the...
In this paper, we introduce an optical network with cross-layer security, which can enhance security performance. In the transmitter, the user's data is encrypted at first. After that, based on optical encoding, physical layer encryption is implemented. In the receiver, after the corresponding optical decoding process, decryption algorithm is used to restore user's data. In this paper, the security...
We put forward the first all-optical optical code-division multiple-access(OCDMA) system with 2 users based on variable code shift keying(CSK). The all-optical exclusive OR logical gate in the system employs the ultrafast performance of optical fiber nonlinear effect and operates without wavelength transforming. In our system, the data rate is 10Gb/s and the transmission distance in optical fiber...
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