Methods of data protection for quantum secure communication system

In this paper the methods of data protection for developed by authors earlier multichannel system of quantum secure communication are proposed. These methods allow closing the intercepted data from the unauthorized user. The simulation model of quantum secure communication system on optical fiber is developed. This model depends on three parameters: probabilities of an error in the fiber optic channel, time of detection of unauthorized connection to the fiber optic line and transmission rate. Results of modeling for two methods of data protection are presented.