Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-01-04
2005-01-04
Wright, Norman M. (Department: 2134)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C380S246000
Reexamination Certificate
active
06839844
ABSTRACT:
A portion of an image is selected as an arbitrary rectangle indicated by diagonal coordinates, and this portion of an image is encrypted and embedded in the original rectangular image portion, thus accomplishing partial encryption of the image. This is done by an image encryption device, in which an partial image data selector, encryptor and decryptor are connected via a memory; and a display, auxiliary (external) memory, keyboard, mouse, image scanner, camera, etc. are also connected. At the time of decryption, the encrypted rectangle is decrypted and returned to its original state.
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Koda & Androlia
Okano Hirokazu
Okano Junko
Okano Makoto
Okano Masayuki
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