Method for facilitating legitimate use of digital content

Details Method for facilitating legitimate use of digital content Method for facilitating legitimate use of digital content

2005-11-15

2005-11-15

Caldwell, Andrew (Department: 2137)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C382S100000

Reexamination Certificate

active

06965996

ABSTRACT:
Method of data operation facilitating utilization of legitimate users without violating the copyright and literary property of digital content. A part of digital content (11) is duplicated to create discrete data unit (43), and is encrypted with content key (45). Content key (45) and image-compositing information (42) are encrypted with secret key (47) to create authorization information (48). Content information (41) is visibly embedded in digital content (11). Authorization information-added data unit (50) in which authorization information (48) is embedded as invisible information and encrypted discrete data unit information (46) are composited into composite data (60), which is then distributed.

REFERENCES:
patent: 6182218 (2001-01-01), Saito
patent: 6490681 (2002-12-01), Kobayashi et al.
patent: 6707927 (2004-03-01), Kita et al.
patent: 2002/0002466 (2002-01-01), Kambayashi et al.
patent: 11-119651 (1999-04-01), None
patent: 11-283327 (1999-10-01), None

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