Description: The analysis of modern standards of cellular connection and comparative research of facilities of defence of information is conducted in the networks of telecommunications of standard of GSM. Found out the basic constituents of the modern system of defence of communication network. The features of procedures of authentification and authentication, and also providing of confidentiality of information, are illustrated in communication of standard of GSM networks. A conclusion is done about the necessity of subsequent perfection of the system of defence of information in the networks of telecommunications of standard of GSM.
Keywords: systems of telecommunications and networks, digital flow lines, standard of GSM