Enhanced Design for AWG-Based Dynamic Reconfigurable Free-Spectral-Range Group Hopping Coder/Decoders to Protect against Eavesdropping

Abstract:

To further robust confidentiality protecting against eavesdropping over optical code-division multiple-access (OCDMA) networks, this study improves the robustness of the network toward eavesdropping for encryption/decryption mechanism by using a specified storage register controller controlling optical switches approach in which Free-spectral-range group hopping code is used to generate a specific signature address. This paper presents an enhanced security mechanism to protect spectral-amplitude-coding optical code-division multiple-access (SAC-OCDMA) networks against eavesdropping. This study proposes an alternative to huge code-space size techniques such as wavelength hopping and exchange-encode for network protection against eavesdropping by exploiting the cyclic properties of arrayed-waveguide-grating routers and maximal-length sequence code (M-sequence code). In addition, the network is protected using a wavelength hopping based on optical switches and exchange the encode assignment scheme implemented using the exchange switches before import to arrayed-waveguide-grating routers (AWG).In this scheme, eavesdropper is difficult to solute correct user data bit , whatever there is using brute-force searching or simple energy detector..

• Periodical: Applied Mechanics and Materials (Volumes 764-765)
• Pages: 1240-1244
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.764-765.1240
• Online since: May 2015
• Authors: Yao Tang Chang*, Chung Wei Tsailin
• Keywords: Arrayed-Waveguide-Grating Routers (AWG), Dynamic Reconfigurable Coder/Decoder, Exchange Switches, Free-Spectral-Range (FSR), Optical Code-Division Multiple-Access (OCDMA)

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