Abstract
We develop a spread-spectrum-based approach to security-enhanced transmission over an existing public wavelength-division-multiplexing (WDM) lightwave network. Secure transmission for a dedicated user is achieved by overlaying a covert channel onto a multichannel WDM network. The covert channel is spectrally encoded using the technique of frequency hopping and then temporally spread by a dispersive element, with the resulting average power below the noise floor in the fiber. The presence of the WDM channels provides an ad hoc security expansion and increases the difficulty for an eavesdropper to intercept and decode the secure signal.
Original language | English (US) |
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Pages (from-to) | 1870-1872 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 18 |
Issue number | 17 |
DOIs | |
State | Published - Sep 1 2006 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
Keywords
- Fiber-optics communication
- Optical code-division multiple-access (OCDMA)
- Optical fiber communications and networks
- Wavelength-division multiplexing (WDM)