Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2008-06-12
2011-10-04
Dinh, Minh (Department: 2432)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C726S026000, C726S030000
Reexamination Certificate
active
08032758
ABSTRACT:
The disclosure describes methods for using digital watermarking to authenticate digital media signals, such as images, audio and video signals. It also describes techniques for using embedded watermarks to repair altered parts of a media signal when alteration is detected. Alteration is detected using hashes, digital watermarks, and a combination of hashes and digital watermarks.
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Digimarc Corporation
Dinh Minh
Perungavoor Venkatanarayanan
LandOfFree
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