Today the protection of information transmitted in communication networks remains current. Confidential communications services are demanded by the executive authorities, emergency services and security agencies (Ministry of Defense, Ministry of Internal Affairs, Ministry of Emergency Situations and Federal Security Service), as well as commercial enterprises interested in the security of communication. Information security is not only mandatory, but also acts as one of the most important characteristics of an information system. Employees of the Group of Companies "INFORMTEKHNIKA" successfully solve tasks of security, development and improvement of departmental systems of information protection against leaking via technical channels, protection against unauthorized access to departmental facilities of information, as well as the system to counter the technical intelligence.