FIELD: data transfer.
SUBSTANCE: invention relates to TV and radio broadcasting systems and to data transfer systems using cables, communication lines and networks with user access control systems for transmitted information. From transmitting side, system is comprised of multiplexer, scrambler, modulator, access right encipherer, keyword encipherer, keyword generator, and content data server. From receiving side, the system includes tuner, demodulator, descrambler, de-multiplexer, central control unit, keyword decoder, access right decoder, authorisation system, administering system, protection processor. Upon administering system fault, access to services for all broadcasting system users is not terminated.
EFFECT: improvement of system reliability.
4 cl, 3 dwg
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