Electrical computers and digital processing systems: support – Data processing protection using cryptography
Reexamination Certificate
2004-01-23
2009-08-25
Korzuch, William R (Department: 2431)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
C726S026000, C714S758000, C714S799000
Reexamination Certificate
active
07581115
ABSTRACT:
Even when encoded (compressed) image data appended with an error-detecting code is encrypted, the apparatus which receives and reproduces that image data can execute a normal process without any insignificant re-send request and the like. To this end, encoded image data is input, and first error-detecting encoding information contained in its header is checked to determine whether or not an error-detecting code is appended. If it is determined that the error-detecting code is appended, the first error-detecting encoding information is changed to indicate the absence of an error-detecting code, and is saved as second error-detecting encoding information. Then, the encoded image data is encrypted.
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Hayashi Junichi
Suga Yuji
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Korzuch William R
Su Sarah
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