System and method for distributing digital content

Details System and method for distributing digital content System and method for distributing digital content

2005-12-20

2005-12-20

Morse, Gregory (Department: 2134)

Cryptography

Video cryptography

Copy protection or prevention

C713S152000

Reexamination Certificate

active

06978020

ABSTRACT:
A system and method for distributing digital content is capable of preventing illegal use of digital content and leak of user information. A creator terminal110forwards content, copyright information and conditions for quotation to a content distribution server120. A user terminal130forwards an application for using the content to the content distribution server120. The content distribution server120embeds copyright information in the content to which the user terminal130has forwarded the application for using the content and the user information is embedded in the content to which the user terminal130has forwarded the application for using the content. The relation among a content size Sq which is permitted to be quoted according to conditions for quotation, a content size Sc in which the copyright information is embedded and a content size Su in which the user information is embedded is expressed by Sc<Sq<Su.

REFERENCES:
patent: 6005643 (1999-12-01), Morimoto et al.
patent: 10-254909 (1998-09-01), None
Patent Abstracts of Japan, Publication No. 10-254909.

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