FIELD: radio engineering, communication.
SUBSTANCE: disclosed is a method and an apparatus which enable to conceal protected information in spectrally clocked sets of N multi-protocol data streams. Owing to introduction of decision feedback at the physical layer and enabling adaptation of transmission rate to the quality of the steganographic transmission channel, the reliability of receiving secure information considerably increases.
EFFECT: high security of transmitting additional information with a variable rate and given reliability.
4 cl, 9 dwg
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