Distribution system, distribution apparatus, and reception...

Details Distribution system, distribution apparatus, and reception... Distribution system, distribution apparatus, and reception...

2008-06-10

2008-06-10

Vaughn, Jr., William (Department: 2144)

Electrical computers and digital processing systems: multicomput

Computer-to-computer session/connection establishing

Session/connection parameter setting

C709S224000, C726S027000

Reexamination Certificate

active

07386618

ABSTRACT:
A reception apparatus includes a first timer and sends to a distribution apparatus a first date-time clocked by the first timer. The distributing apparatus includes a second timer, and generates expiry information based on a difference obtained by subtracting, from the first date-time, a second date-time that is clocked by the second timer. The expiry information is used to adjust a usage expiry date-time of content. The reception apparatus judges whether playback of the content is permitted based on the first timer and the expiry information. With this arrangement, unauthorized use of the content beyond the expiry date-time is prevented.

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