Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2007-05-22
2007-05-22
Zand, Kambiz (Department: 2134)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C380S054000, C380S028000
Reexamination Certificate
active
09539421
ABSTRACT:
An image processing system comprises an image providing apparatus which provides an image file, from which a digital watermark information can be extracted by using a watermark key that includes an authentication information which authenticates the image file provided by an valid provider, and the watermark key of the image file; and an image utilizing apparatus which extracts the digital watermark information from the image file provided by the image providing apparatus using the watermark key provided by the image providing apparatus, verifies whether the watermark key has been tampered or not using the authentication information in the watermark key, verifies whether the image file has been tampered or not using the verified watermark key, and displays the verified image file.
REFERENCES:
patent: 5875249 (1999-02-01), Mintzer et al.
patent: 5901224 (1999-05-01), Hecht
patent: 6233684 (2001-05-01), Stefik et al.
patent: 6504941 (2003-01-01), Wong
patent: 6553127 (2003-04-01), Kurowski
patent: H-4-158487 (1992-06-01), None
Sartori Michael A.
Tran Ellen C
Venable LLP
Voorhees Catherine M.
Zand Kambiz
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