Optical steganography based on amplified spontaneous emission noise

We propose and experimentally demonstrate an optical steganography method in which a data signal is transmitted using amplified spontaneous emission (ASE) noise as a carrier. The ASE serving as a carrier for the private signal has an identical frequency spectrum to the existing noise generated by th...

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Bibliographic Details
Published in:Optics express 2013-01, Vol.21 (2), p.2065-2071
Main Authors: Wu, Ben, Wang, Zhenxing, Tian, Yue, Fok, Mable P, Shastri, Bhavin J, Kanoff, Daniel R, Prucnal, Paul R
Format: Article
Language:English
Subjects:
Algorithms
Amplifiers, Electronic
Computer Security - instrumentation
Equipment Design
Equipment Failure Analysis
Fiber Optic Technology - instrumentation
Information Storage and Retrieval - methods
Optical Devices
Signal-To-Noise Ratio
Telecommunications - instrumentation
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Summary:We propose and experimentally demonstrate an optical steganography method in which a data signal is transmitted using amplified spontaneous emission (ASE) noise as a carrier. The ASE serving as a carrier for the private signal has an identical frequency spectrum to the existing noise generated by the Erbium doped fiber amplifiers (EDFAs) in the transmission system. The system also carries a conventional data channel that is not private. The so-called "stealth" or private channel is well-hidden within the noise of the system. Phase modulation is used for both the stealth channel and the public channel. Using homodyne detection, the short coherence length of the ASE ensures that the stealth signal can only be recovered if the receiver closely matches the delay-length difference, which is deliberately changed in a dynamic fashion that is only known to the transmitter and its intended receiver.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.002065