Improving the privacy of optical steganography with temporal phase masks
Optics Express, Vol. 18, Issue 6, pp. 6079-6088 (2010)
http://dx.doi.org/10.1364/OE.18.006079
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Abstract
Temporal phase modulation of spread stealth signals is proposed and demonstrated to improve optical steganography transmission privacy. After phase modulation, the temporally spread stealth signal has a more complex spectral-phase-temporal relationship, such that the original temporal profile cannot be restored when only dispersion compensation is applied to the temporally spread stealth signals. Therefore, it increases the difficulty for the eavesdropper to detect and intercept the stealth channel that is hidden under a public transmission, even with a correct dispersion compensation device. The experimental results demonstrate the feasibility of this approach and display insignificant degradation in transmission performance, compared to the conventional stealth transmission without temporal phase modulation. The proposed system can also work without a clock transmission for signal synchronization. Our analysis and simulation results show that it is difficult for the adversary to detect the existence of the stealth transmission, or find the correct phase mask to recover the stealth signals.
© 2010 OSA
OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4510) Fiber optics and optical communications : Optical communications
(060.4785) Fiber optics and optical communications : Optical security and encryption
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: December 17, 2009
Revised Manuscript: February 14, 2010
Manuscript Accepted: February 22, 2010
Published: March 11, 2010
Citation
Z. Wang, M. P. Fok, L. Xu, J. Chang, and P. R. Prucnal, "Improving the privacy of optical steganography with temporal phase masks," Opt. Express 18, 6079-6088 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-6-6079
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References
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