Cryptography – By modifying optical image
Patent
1993-04-15
1994-08-09
Swann, Tod R.
Cryptography
By modifying optical image
380 30, G09C 500
Patent
active
053373626
ABSTRACT:
A method and apparatus for placing digital data on plain paper. One embodiment of the present invention allows for the digital data to undergo encryption before being placed on the plain paper. In one embodiment, a photocopier is used for transferring digital encrypted data to and from a plain piece of paper. The photocopier allows digital data to be stored onto plain paper after encryption, such that the digital data is secure. The photocopier also includes a device to recognize the encrypted digitized pixels on the page such that they may be decrypted and the original image reproduced.
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patent: 4782221 (1988-11-01), Brass et al.
patent: 4853961 (1989-08-01), Pastor
patent: 4939354 (1990-07-01), Priddy et al.
patent: 5113445 (1992-05-01), Wang
patent: 5170044 (1992-12-01), Pastor
Gormish Michael J.
Peairs Mark
Stork David G.
Ricoh & Company, Ltd.
Ricoh Corporation
Swann Tod R.
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