FIELD: information technologies.
SUBSTANCE: method is carried out by reduction of probability of recognising transmitted data in a communication line. The method to protect information in a communication line against leakage due to external electromagnetic radiation and noise consists in the fact that digital signals transfer along a communication line is terminated. Then this line is complemented with an additional line, and masking signals are sent synchronously together with the transfer along the secured line along this additional line. Besides, amplitude and frequency-time parameters of masking signals are selected so that the picture of external electromagnetic radiations and noise from both lines as a whole that occurs in environment in process of data transfer, is identical for each pulse of transmission.
EFFECT: increased efficiency of protection of information that circulates in channels of information processing, against leakage due to external electromagnetic radiations and noise.
5 cl, 4 dwg
