Temporally threaded CMI watermark

Details Temporally threaded CMI watermark Temporally threaded CMI watermark

2008-12-20

2010-11-30

Song, Hosuk (Department: 2435)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C380S201000, C726S026000

Reexamination Certificate

active

07844822

ABSTRACT:
Disclosed is a temporally threaded copyright management information watermark where fragile watermarks containing CMI are spread throughout a digital work temporally. In one embodiment of this invention, the copyright management information is divided into a multitude of copyright management information subparts; the copyright management subparts are applied to fragile sub-watermarks; and fragile watermarks are applied to temporally separated portions of the digital work.

REFERENCES:
patent: 6185312 (2001-02-01), Nakamura et al.

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