FIELD: electronic engineering. SUBSTANCE: method involves transmission of composite video signals incorporating access pulses (ECM1 and ECM2); noise is eliminated by means of microprocessor card reader that has encoded numeric data; interactive method is used for identifying digital signature. Method is characterized in that batches of numeric data incorporating check word encoded according to coding algorithm are entered in lines not used by image. EFFECT: improved protection against unauthorized access. 3 cl, 5 dwg
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