Cryptography – Having production of printed copy
Reexamination Certificate
2011-04-26
2011-04-26
Zee, Edward (Department: 2435)
Cryptography
Having production of printed copy
Reexamination Certificate
active
07933406
ABSTRACT:
An encryption device which is capable of preparing an encrypted document not easily deciphered by a third person. The encryption device encrypts information formed on a recording member on the basis of a predetermined encryption code. A surface of the recording member is irradiated with light. An image of the irradiated surface of the recording member irradiated with the light is taken. The encryption code is prepared on the basis of the taken image of the irradiated surface.
REFERENCES:
patent: 6999588 (2006-02-01), Oishi
patent: 2003/0123696 (2003-07-01), Matsumoto et al.
patent: 11-041383 (1999-02-01), None
Canon Kabushiki Kaisha
Rossi Kimms & McDowell LLP
Zee Edward
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