Access control method and information utilization apparatus

Interactive video distribution systems – Access control or blocking

Reexamination Certificate

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Details

C725S027000, C725S029000, C726S026000, C726S027000, C726S028000, C726S029000, C726S033000, C380S230000, C380S233000

Reexamination Certificate

active

07131133

ABSTRACT:
The encoded contents of a piece of delivered information is accompanied by an applicable time data indicating a specific time period for authorizing a particular mode of utilization. When a request for utilizing the contents is issued in an information utilization apparatus, it determines if the current time agrees with the time authorizing the requested utilization by referring to the time data annexed to the encoded contents. If the request is acceptable at the current time, a set of processing steps is carried out for decoding the encoded contents and other necessary operations. Thus, an information access control method can be adapted to have flexibility in setting charges and access requirements for the contents of information that can change the value and the mode of utilization with time.

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Mori etal., “Superdistribution: The Concept and the Architecture,” The Transactions of the IEICE, vol. E73 No. 7, Jul. 1990.

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