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Optical Engineering

Securing optical code-division multiple-access networks with a postswitching coding scheme of signature reconfiguration
Author(s): Jen-Fa Huang; Sheng-Hui Meng; Ying-Chen Lin
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Paper Abstract

The optical code-division multiple-access (OCDMA) technique is considered a good candidate for providing optical layer security. An enhanced OCDMA network security mechanism with a pseudonoise (PN) random digital signals type of maximal-length sequence (M-sequence) code switching to protect against eavesdropping is presented. Signature codes unique to individual OCDMA-network users are reconfigured according to the register state of the controlling electrical shift registers. Examples of signature reconfiguration following state switching of the controlling shift register for both the network user and the eavesdropper are numerically illustrated. Dynamically changing the PN state of the shift register to reconfigure the user signature sequence is shown; this hinders eavesdroppers’ efforts to decode correct data sequences. The proposed scheme increases the probability of eavesdroppers committing errors in decoding and thereby substantially enhances the degree of an OCDMA network’s confidentiality.

Paper Details

Date Published: 3 November 2014
PDF: 10 pages
Opt. Eng. 53(11) 116101 doi: 10.1117/1.OE.53.11.116101
Published in: Optical Engineering Volume 53, Issue 11
Show Author Affiliations
Jen-Fa Huang, National Cheng Kung Univ. (Taiwan)
Sheng-Hui Meng, National Cheng Kung Univ. (Taiwan)
Ying-Chen Lin, National Cheng Kung Univ. (Taiwan)

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