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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 6 — Mar. 15, 2010
  • pp: 6079–6088

Improving the privacy of optical steganography with temporal phase masks

Z. Wang, M. P. Fok, L. Xu, J. Chang, and P. R. Prucnal  »View Author Affiliations

Optics Express, Vol. 18, Issue 6, pp. 6079-6088 (2010)

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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

Original Manuscript: December 17, 2009
Revised Manuscript: February 14, 2010
Manuscript Accepted: February 22, 2010
Published: March 11, 2010

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)

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  1. B. B. Wu and E. E. Narimanov, “A method for secure communications over a public fiber-optical network,” Opt. Express 14(9), 3738–3751 (2006). [CrossRef] [PubMed]
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