In this paper the problem of information security in the network is considered. Organizational and technical measures to protect information should ensure the effective and timely detection and blocking of threats to information security, the implementation of which may lead to unacceptable negative consequences. The most common threat is network traffic, the movement of data flows between different web resources. The methods of detecting unauthorized traffic to select the best were analyzed. A mathematical model for detecting unauthorized traffic and detection software have been developed.The results of experimental studies of the developed software were presented, which showed the possibility of its use for detecting unauthorized traffic.

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