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MODERN METHODS OF ILLEGAL PASSAGE IN THE LINEAR CHANNEL FIBER-OPTICAL COMMUNICATION SYSTEMS

Djalilov Baxromjon Оdiljonovich, Sobirova Kamola Abduvoxid qizi, Akbarova Mohigul Asrorjon qizi

Published Dec 3, 2022• 0 citations
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Abstract

In this article it is investigated existing modern methods and the means, applied with a view of illegal access to the information in a line channel of fiber-optical communication systems, their principles of work. Also in this work the analysis of these methods are carried out. As a result of research and the analysis necessary conclusions for realization of measures on maintenance information security in fiber-optical communication systems becomes.

DOI
10.5281/zenodo.7393854

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In this article it is investigated existing modern methods and the means, applied with a view of illegal access to the information in a line channel of fiber-optical communication systems, their principles of work. Also in this work the analysis of these methods are carried out. As a result of research and the analysis necessary conclusions for realization of measures on maintenance information security in fiber-optical communication systems becomes.
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Every year increases the amount of confidential information that is transmitted in optical communication networks. To ensure safe transmission of confidential information fiber optic lines are the most suitable. It is determined that the electromagnetic field of the light wave does not go beyond the optical fiber. However, under certain circumstances, interception of optical signal on the bend of the fibers is entirely possible. Thus, for the creation of optical lines with high level of information security are necessary additional measures. To this aim, in the proposed use of masking optical linear code by increasing the numbers of units are used passive components such as optical delay lines and optical splitters. The method allow increasing the number of units of code combinations to be transferred, and thus make it impossible for an adequate interpretation of the information. The advantage of the method is that the protection device is completely passive, and therefore reliable, and can be connected directly to the input and output of optical linear tract. Moreover, these devices do not require adjustment.
The system for transmission and reception of confidential information over fiber-optic communication line on the basis of created single-quantum registration system of optical radiation has 43 been suggested. With regard to such a communication system two types of optical wavelengths have been experimentally justified. One type of optical wavelength is used for information transfer and the second one for time synchronization of information transmission and reception, as well as for detection of unauthorized access to information, created with optical fiber macrobends. Optimal values of optical power, which allowed to provide the highest confidential information data rate and detect more effectively possible data loss channels have been established.
Solving the problem of ensuring the information security of the fiber-optics systems requires an analysis of possible methods of unauthorized access. Improving the technology of installation and operation of the fiber-optics systems not only enhances the quality and distance of information transmission over an optical cable, but also potentially expands the range of channels for possible leakage of information transmitted through it. Improving the construct of the optical fibers, the use of such technologies as wavelength division multiplexing (WDM), necessitates a complex analysis of increasing the information capacity and security of fiber-optics systems from unauthorized access. The paper compares the security of the fiber-optics systems built on the standard single mode fiber (SSMF) and dispersion shifted fiber (DSF). It is shown that, despite of the possibility of a higher information capacity, fiber-optics systems built on DSF require more careful control to avoid unauthorized access than in the case of using standard SSMF.