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IEEE International Conference on Electronics Information and Emergency Communication

A Novel Scheme of Delay Attack-resistant Network Based on Optical Coding

Mandong Liu, Peng Ouyang, Jianhua Ji, Ming Xu

Published Jul 15, 2022• 0 citations
Publisher

Abstract

We propose and investigate a novel scheme of delay attack-resistant network based on optical code division multiple access (OCDMA). The bit error rate (BER) is analyzed theoretically, and the closed expression of BER is obtained. The system has a corresponding optimal threshold to minimize the BER in different cases. At the same transmission power, the BER will decrease when the code weight increases. Furthermore, the maximum number of users is different with different code weight and transmission power. Optisystem simulation results show that OCDMA system has delay attack-resistant performance, which can effectively improve the physical layer security of optical network.

DOI
10.1109/iceiec54567.2022.9835082

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We propose and investigate a novel scheme of delay attack-resistant network based on optical code division multiple access (OCDMA). The bit error rate (BER) is analyzed theoretically, and the closed expression of BER is obtained. The system has a corresponding optimal threshold to minimize the BER in different cases. At the same transmission power, the BER will decrease when the code weight increases. Furthermore, the maximum number of users is different with different code weight and transmission power. Optisystem simulation results show that OCDMA system has delay attack-resistant performance, which can effectively improve the physical layer security of optical network.
A multi-user cross-layer security network based on optical code division multiple access (OCDMA) and algorithmic cryptography is proposed, and its security performance is analyzed quantitatively for the first time. In this scheme, eavesdroppers have to not only intercept the optical code of OCDMA in physical-layer, but also break the algorithmic cryptography in data-layer. Thus, the information security will be enhanced effectively. Synchronous transmission system and asynchronous transmission system are analyzed respectively. It can be seen that the cross-layer security of asynchronous transmission is far greater than that of synchronous transmission when the number of users is large enough. OptiSystem simulation is used to investigate the image transmission in cross-layer security system. The transmission distance of single mode fiber is 100 km, and transmission rates are 10 Gbit/s and 1 Gbit/s respectively. It can be seen that legitimate user can recover original image correctly with matched decoder and correct encryption algorithm. However, eavesdroppers cannot recover the image correctly with matched decoder/wrong encryption algorithm or unmatched decoder/correct encryption algorithm. Therefore, our scheme can greatly enhance the security of image transmission system.
We present the development of a multi-user cross-layer security network implemented on the optical code-division multiple access (OCDMA) with newly designed hybrid 2D-modified Walsh code (MWC) along with an algorithmic approach in cryptography domain. Minimum BER value is evaluated on the order of 10 − 50 using our designed MWC, which is comparatively lower than other existing codes. The security performance of the network was analyzed using the probability detection parameter, which was found to be superior apart from few other available existing codes. The enhancement of the quality and grade of security in this network eavesdropper can intercept the designed optical code of OCDMA in the physical layer. It compels one to break the security in the data-layer to access the original code. We also calculated the probability of successful data interception as a function of time complexity. Furthermore, we presented the simulation of the hybrid system using the OptiSystem simulator.
Based on information-theoretic security, physical-layer security in an optical code division multiple access (OCDMA) system is analyzed. For the first time, the security leakage factor is employed to evaluate the physical-layer security level, and the safe receiving distance is used to measure the security transmission range. By establishing the wiretap channel model of a coherent OCDMA system, the influences of the extraction location, the extraction ratio, the number of active users, and the length of the code on the physical-layer security are analyzed quantitatively. The physical-layer security and reliability of the coherent OCDMA system are evaluated under the premise of satisfying the legitimate user’s bit error rate and the security leakage factor. The simulation results show that the number of users must be in a certain interval in order to meet the legitimate user’s reliability and security. Furthermore, the security performance of the coherent OCDMA-based wiretap channel can be improved by increasing the code length.
This paper puts forward a cross-layer security model for optical networks using Spectral Amplitude CodingOptical Code Division Multiple Access (SAC-OCDMA) as a combination with optical cryptography. The new architecture provides data confidentiality through two layers of protection: (1) physical layer Bragg filter-based spectral encoding and (2) data layer XOR logic gate-based encryption through a Semiconductor Optical Amplifier Mach-Zehnder Interferometer (SOA-MZI). In this method, unauthorized users must bypass both the spectral coding and optical encryption mechanisms, which significantly strengthen transmission security. The system is simulated using OptiSystem software, and the results show an improved perfor- mance of the Bit Error Rate (BER) and Quality (Q) factors. This hybrid optical security model demonstrates high potential for applications in secure fiber-optic communication networks.
Optical code-division multiple-access (OCDMA) is considered as a good technique to provide optical layer security. Many research works have been published to enhance optical network security by using optical signal processing. The paper, demonstrates the design of the AWG (arrayed waveguide grating) router-based optical network for spectral-amplitude-coding (SAC) OCDMA networks with Walsh Code to design a reconfigurable network codec by changing signature codes to against eavesdropping. In this paper we proposed a code reconfiguration scheme to improve the network access confidentiality changing the signature codes by cyclic rotations, for OCDMA system. Each of the OCDMA network users is assigned a unique signature code to transmit the information and at the receiving end each receiver correlates its own signature pattern a(n) with the receiving pattern s(n). The signal arriving at proper destination leads to s(n)=a(n).
This chapter focuses primarily on summarizing results of research on optical code-division multiple access (OCDMA) confidentiality and security. It introduces the various classes of security for the readers who may not be familiar with the field of security and encryption. The chapter discusses how the degree of security in an OCDMA network can be quantified. OCDMA may be advantageous for increasing network availability in the presence of interfering signals, because the signal is spread over many wavelengths. The most commonly used architecture for OCDMA networks is the star network. In the star network, data from all users are collected at some central point and then distributed to all users. An eavesdropper in an OCDMA network may tap signals from various locations within the network. The network designer can design some countermeasures to make the eavesdropper's job a bit more difficult. OCDMA provides security at the physical layer of a communication network.