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Temporal phase modulation of spread stealth signals is proposed to improve optical steganography transmission privacy. It increases an eavesdropper's difficulty of detecting and intercepting the stealth channel hidden under public transmission, even with dispersion compensation.
We demonstrate optical code-division multiple access (OCDMA) code conversion in the wavelength domain using periodically poled LiNbO3 for enhanced transmission security. The number of possible OCDMA codes in the channel is greatly increased and randomized dynamic code conversion is feasible, thus making it more difficult for an eavesdropper to intercept and decode the code. A 2.5-dB power penalty...
We propose and demonstrate the enhancement of data networks security using optical signal processing. Optical steganography that based on spread spectrum is used to inhibit the observation and analysis of data traffic. With the use of optical CDMA, service interruption is prevented in the presence of infrastructure attacks. Unlike conventional wavelength and time multiplexing approaches, the soft...
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