Methods and Means of Ensuring Information Security in Fiber-Optic Communication Lines

Abstract

This paper considers the problem of protection against an unauthorized access and presents the results of comparing different methods for extracting data from optical fiber. This paper provides classification of methods of information receiving, physical principles of leakage channels formation, as well as methodology as to how to send a share of the optical radiation outside the propagation medium. The simplest of the analyzed methods is the bending of the optical fiber when the conditions of full internal reflection are broken. In this case, the monitoring system controls the introduced losses to detect fiber bends. This work outlines the structure, principles of operation, as well as the trends in the development of monitoring systems.