Physical layer security in fiber-optic networks using optical signal processing

Paul R. Prucnal, Mable P. Fok, Yanhua Deng, Zhenxing Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


Using optical processing techniques, we experimentally enhance the physical layer security of optical communication systems. We exploit optical encryption using fiber nonlinearity to achieve real time data encryption. By implementing interleaved waveband switching modulation and variable two-code keying to the system, the security of the data is further enhanced. Based on spread spectrum, we also demonstrate optical steganography such that the stealth signal is transmitted underneath system noise. Optical steganography in WDM and optical CDMA systems is experimentally demonstrated. We also propose and study optical CDMA-based backup channels that improve service availability without wasting the bandwidth in the backup channel. The multi-layered security provided improves the confidentiality and availability of the network.

Original languageEnglish (US)
Title of host publicationOptical Transmission Systems, Switching, and Subsystems VII
StatePublished - 2009
EventOptical Transmission Systems, Switching, and Subsystems VII - Shanghai, China
Duration: Nov 2 2009Nov 6 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOptical Transmission Systems, Switching, and Subsystems VII

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


  • Network security
  • Optical encryption
  • Optical signal processing
  • Optical steganography
  • Survivable network


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