Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

IEEE International Conference on Photonics

Hybrid SAC/Optical CDMA-WDM overlay system for enhancing network security

Isaac A. M. Ashour, Sahbudin B. Shaari, Hossam M. H. Shalaby, P. Susthitha Menon, Hesham A. Bakarman

Published Jul 1, 2010• 4 citations
Publisher

Abstract

An enhancement of data networks security using a hybrid WDM and SAC/Optical CDMA System is proposed. Secure transmission for dedicated users is achieved by overlaying a covert channel onto a multichannel WDM network. The covert channel is spectrally encoded using spectral amplitude coding (SAC) with unipolar Modified Double Weight (MDW) as the signature address code. OCDMA improves service availability in the presence of physical infrastructure attacks. With the use of WDM channels, the difficulty for an eavesdropper to intercept and decode the secure signal is increased. A simulation is presented as a demonstration of the concept.

DOI
10.1109/icp.2010.5604393

Related papers

Simulation of MQC code of SAC/Optical CDMA and WDM hybrid overlay system

Isaac A. M. Ashour, Hossam M. H. Shalaby, Sahbudin B. Shaari +1 more

A hybrid WDM and SAC/Optical CDMA System is proposed to enhance the data network security and to exploit the capacity of an optical system. Code pulses of SAC/Optical CDMA are overlaid onto a multichannel WDM system. Modified Quadratic Congruence (MQC) code is as the signature address code for SAC/Optical CDMA. In general, OCDMA improves service availability for data of a network. With the use of WDM channels in a hybrid scheme, an eavesdropper faces another challenge for intercepting and decoding the coded signal. The interference that is the main factor limits the performance of the proposed system. So that, the notch filters and APD photo detectors instead of PIN photo detectors are used in order to improve the SAC/OCDMA performance. A simulation is presented as a demonstration of the concept.

International Conference on Modeling, Simulation, and Applied Optimization•Apr 1, 2011•2 citations

Secure transmission over an existing public WDM lightwave network

Biwei Wu, Paul R. Prucnal, Evgenii E. Narimanov

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

IEEE Photonics Technology Letters•Aug 23, 2006•34 citations

Security analysis in optical CDMA network systems

Nihad Ibrahim Abdullah, Abd Samad Hasan Basari, Abdul Karim Mohamad +4 more

(OCDMA) is an alternative method, which performs encoding and decoding through an optical signature code, in order to allow the selection of the desired signal so that different users can share the same bandwidth. In such a system, the data signal overlap both in time and wavelength. Tradeoffs between security and performance in optical CDMA are presented. Confidentiality against eavesdropper interception strategies for optical CDMA is considered. Coherent detection and combining signals shows better confidentiality than the incoherent one. Spectral amplitude optical CDMA based on Modified Double Weight (MDW) systems, with different code dimension, is investigated. Increasing the network system capacity or maximizing authorized specified SNRs will lead to eavesdropper to detect high SNRs.

Religación•Jul 19, 2019•0 citations

Security Based Performance Analysis in Optical CDMA Network Systems

Mohamed Mansour Shukra

OCDMA) is an alternative method, which performs encoding and decoding through an optical signature code, in order to allow the selection of a desired signal so that different users can share the same bandwidth.In such a systems, data signal overlap both in time and wavelength.Tradeoffs between security and performance in optical CDMA are presented.Confidentiality against eavesdropper interception strategies for optical CDMA is considered.Coherent detection and combining signals shows better confidentiality than the incoherent one.Spectral amplitude optical CDMA based on Modified Double Weight (MDW) systems, with different code dimension, is investigated.Increasing the network system capacity or maximizing authorized specified SNRs will lead to eavesdropper to detect high SNRs.

IOSR Journal of Electronics and Communication Engineering•Jan 1, 2013•6 citations

Security enhancement for spectral amplitude coding OCDMA based on hybrid EDW/M seq. code systems

Hesham A. Bakarman, Feras N. Hasoon, Sahbudin B. Shaari +1 more

This paper presents the security enhancement for spectral amplitude coding optical CDMA. The eavesdropper probability of error-free code detection based on hybrid code system is investigated. Enhancement Double Weight (EDW) optical CDMA scheme and M-sequence codes are used as a hybrid code system. The eavesdropper performance is based on observing the authorized transmitted signal based on classical detection theory. The eavesdropper taps a coded transmission of a particular user and performs the necessary calculations to derive the transmitter's code word from these transmissions. If an eavesdropper could be forced to tap code pulses with low SNRs, a security enhancement can be obtained. An eavesdropper would need SNR of 9.2 dB to correctly detect encoded pulses with a probability of 50 % for the hybrid scheme, which is 5 and 3 dB higher than M-sequence and EDW schemes respectively. The difference in performance of the eavesdropper's receiver with envelope detection is getting small, especially at higher SNRs.

International Conference on Computer and Communication Engineering•May 1, 2010•3 citations

Simulation of security performance for unipolar and bipolar Optical CDMA Network Systems

Hesham A. Bakarman, Ali Z. Ghazi Zahid, Feras N. Hasoon +2 more

This paper presents security performance for incoherent unipolar and bipolar Optical CDMA Network Systems. The eavesdropper performance is investigated, by simulation, based on Modified Double Weight (MDW) Spectral Amplitude Optical CDMA. Our results show that using unipolar OCDMA code schemes based on MDW code system enhances the security with a low cost implementation in comparison to the bipolar ones.

IEEE Malaysia International Conference on Communications (MICC)•Dec 1, 2009•0 citations
An enhancement of data networks security using a hybrid WDM and SAC/Optical CDMA System is proposed. Secure transmission for dedicated users is achieved by overlaying a covert channel onto a multichannel WDM network. The covert channel is spectrally encoded using spectral amplitude coding (SAC) with unipolar Modified Double Weight (MDW) as the signature address code. OCDMA improves service availability in the presence of physical infrastructure attacks. With the use of WDM channels, the difficulty for an eavesdropper to intercept and decode the secure signal is increased. A simulation is presented as a demonstration of the concept.
A hybrid WDM and SAC/Optical CDMA System is proposed to enhance the data network security and to exploit the capacity of an optical system. Code pulses of SAC/Optical CDMA are overlaid onto a multichannel WDM system. Modified Quadratic Congruence (MQC) code is as the signature address code for SAC/Optical CDMA. In general, OCDMA improves service availability for data of a network. With the use of WDM channels in a hybrid scheme, an eavesdropper faces another challenge for intercepting and decoding the coded signal. The interference that is the main factor limits the performance of the proposed system. So that, the notch filters and APD photo detectors instead of PIN photo detectors are used in order to improve the SAC/OCDMA performance. A simulation is presented as a demonstration of the concept.
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
(OCDMA) is an alternative method, which performs encoding and decoding through an optical signature code, in order to allow the selection of the desired signal so that different users can share the same bandwidth. In such a system, the data signal overlap both in time and wavelength. Tradeoffs between security and performance in optical CDMA are presented. Confidentiality against eavesdropper interception strategies for optical CDMA is considered. Coherent detection and combining signals shows better confidentiality than the incoherent one. Spectral amplitude optical CDMA based on Modified Double Weight (MDW) systems, with different code dimension, is investigated. Increasing the network system capacity or maximizing authorized specified SNRs will lead to eavesdropper to detect high SNRs.
OCDMA) is an alternative method, which performs encoding and decoding through an optical signature code, in order to allow the selection of a desired signal so that different users can share the same bandwidth.In such a systems, data signal overlap both in time and wavelength.Tradeoffs between security and performance in optical CDMA are presented.Confidentiality against eavesdropper interception strategies for optical CDMA is considered.Coherent detection and combining signals shows better confidentiality than the incoherent one.Spectral amplitude optical CDMA based on Modified Double Weight (MDW) systems, with different code dimension, is investigated.Increasing the network system capacity or maximizing authorized specified SNRs will lead to eavesdropper to detect high SNRs.
This paper presents the security enhancement for spectral amplitude coding optical CDMA. The eavesdropper probability of error-free code detection based on hybrid code system is investigated. Enhancement Double Weight (EDW) optical CDMA scheme and M-sequence codes are used as a hybrid code system. The eavesdropper performance is based on observing the authorized transmitted signal based on classical detection theory. The eavesdropper taps a coded transmission of a particular user and performs the necessary calculations to derive the transmitter's code word from these transmissions. If an eavesdropper could be forced to tap code pulses with low SNRs, a security enhancement can be obtained. An eavesdropper would need SNR of 9.2 dB to correctly detect encoded pulses with a probability of 50 % for the hybrid scheme, which is 5 and 3 dB higher than M-sequence and EDW schemes respectively. The difference in performance of the eavesdropper's receiver with envelope detection is getting small, especially at higher SNRs.