Rental system

Details Rental system Rental system

2008-09-16

2008-09-16

Hewitt, II, Calvin L. (Department: 3621)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Usage protection of distributed data files

C705S052000, C705S053000, C705S054000

Reexamination Certificate

active

10161675

ABSTRACT:
At the time of manufacturing a DVD to be provided to a rental agent, a provider device writes an agent-rental expiry along with contents onto the DVD. At the time of renting the DVD to a user, a rental agent device writes a user-expiry onto the DVD. A DVD player acquires a current time from a time source device, and compares the current time with each of a prior time, the agent-rental expiry, and the user-rental expiry. The DVD player plays back the content only when playback conditions are met.

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“Nations search for a hidden code”, Paul Sweeting, Video Business, Jun. 4, 2001, v21, Iss. 23, p. 4.
English translation of a Japanese Office Action dated Sep. 25, 2007, issued in JP 2002-164857.

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