In the article classification is conducted and methods and facilities of realization of informative safety are considered in the telecommunication systems. It is reasonable, that methods and backer-ups of safety are presently known in the telecommunication systems can be presented as formal and informal. To the formal methods and facilities it is suggested to take physical vehicle and programmatic methods and facilities. From position of practical realization the formal methods of informative safety of the telecommunication systems are considered in detail.
electromagnetic compatibility, computer safety, network attacks