FIELD: means of communication.
SUBSTANCE: invention refers to electrical communication equipment and can be used for protecting the data against unauthorised access in communication systems. The essence of the invention is that the set of random numbers, which is taken as the basis of forming symmetric encryption keys, is formed at the receiving and transmitting communications points with opposite measurements of random transmission time of sounding signals from the transmitter to the receiver. Keys are formed by means of irreversible conversions of a large number of transmission time measurements of sounding signals from the transmitter to the receiver, which has been accumulated within the specified operating time interval of information protection equipment. At that, the stored number of measurements is continuously added with successive measurement results.
EFFECT: preventing pick-up of key information near the receiving antenna.
1 dwg
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