In article, an analysis of the results of scientific research of hidden technical channels of information leakage is carried out (here, under the hidden technical channels of information leakage, the authors proposed to understand technical channels of information leakage, measures to counteract which are not provided for by current regulatory documents in the field of technical information protection). For example, technical channels of information leakage created by power lines, in which the dependence of electricity consumption on time is determined by the load of central processing units (CPUs) of computer equipment controlled by a pre-installed special program; acoustic ultrasonic technical channel of information leakage formed by passive speakers and headphones without the use of a microphone; low-frequency magnetic vibrations that occur during the operation of the cpu of the computer equipment; radio radiation that accompanies the process of entering information on a smartphone, which is recorded and analyzed on the intruder’s smartphone using an fm tuner; variations in thermal radiation of the computer equipment body; acoustic radiation generated by disk drives in the process of recording and reading information; electromagnetic radiation that occurs during access to various devices via the USB port; optical radiation of LED indicators of computer equipment, etc. The results of the analysis indicate the presence of real threats unauthorized access to information processed at the computer device, using a hidden technical channels of information leakage and the need for targeted research of the data leakage channels and further improvement of normative-methodical base in the field of technical protection of information. This article analyzes the current Russian and foreign regulatory and methodological framework in the field of technical information protection, scientific publications in this field and justifies the expediency of supplementing the traditionally used in the field of technical information protection concepts of “technical channel of information leakage”, “hidden channel” of information leakage with the concept of “hidden technical channel of information leakage”. The definition of the concept of a hidden technical channel of information leakage is given, as well as its structural scheme and classification of hidden technical channels of information leakage are proposed.