Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2011-04-19
2011-04-19
Smithers, Matthew B (Department: 2437)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S161000, C713S187000, C713S193000, C726S017000, C726S030000, C380S201000
Reexamination Certificate
active
07930548
ABSTRACT:
To provide an image verification system which verifies whether image data has been altered. The image verification system has an image generation apparatus, a first verification apparatus, a second verification apparatus, etc. The image generation apparatus generates image data, a hash value of the image data, and first verification data for the image data. The first verification apparatus verifies whether the image data has been altered, by using the hash value and first verification data. The first verification apparatus generates second verification data (a digital signature) for the image data if the image data has not been altered. The second verification apparatus verifies whether the image data has been altered, by using the image data and second verification data.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Gelagay Shewaye
Smithers Matthew B
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