FIELD: engineering of devices for limiting access to data recorded on an information carrier.
SUBSTANCE: attributes of carrier sectors are recorded in energy-independent memory. Device analyzes informational series, meant for transfer into ports of information accumulator controller. If aforementioned series contain command for type of access to sector, forbidden by code of attribute, and access permission to marked sectors of carrier is not initialized, then device blocks transfer of command to ports of aforementioned controller. In opposite case device does not block the transfer of command. Device contains external clamps for manual initialization of data exchange permission with marked sectors of information carrier, and for permission of software-controlled modification of access signs.
EFFECT: guaranteed prevention of access to protected sectors of information carrier without permission from the user of computer.
2 cl, 3 dwg
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RU2239244C2 |
