Encryption of data in different formats

Details Encryption of data in different formats Encryption of data in different formats

1993-09-27

1997-09-16

Barron, Jr., Gilberto

Cryptography

Electric signal modification

Having production of printed copy

380 10, 380 55, 358444, 399297, G09C 500, H04N 164

Patent

active

056688814

ABSTRACT:
A plurality of apparatuses can execute an encrypting process on an image signal are connected. The encrypting processes which are executed in those apparatuses are independently performed, so that the connection of an improper apparatus is made impossible and, in this state, a more advanced signal process can be performed, thereby giving no disadvantage to the user. For this purpose, there is disclosed an image processing apparatus comprising a first encrypting circuit for encrypting the image data and supplying to a first apparatus and a second encrypting circuit for encrypting image data and supplying to a second apparatus different from the first apparatus, wherein the first and second encrypting means execute independently the encryption.

REFERENCES:
patent: 5077795 (1991-12-01), Rourke et al.
patent: 5121432 (1992-06-01), Gilham et al.
patent: 5144664 (1992-09-01), Esserman et al.
patent: 5168371 (1992-12-01), Takayanagi et al.
patent: 5278903 (1994-01-01), Matsui et al.
patent: 5502575 (1996-03-01), Kai et al.

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