Authenticating pseudo-random code and apparatus

Details Authenticating pseudo-random code and apparatus Authenticating pseudo-random code and apparatus

1989-02-03

1990-11-20

Ruczinski, Stephen C.

Cryptography

By modifying optical image

380 23, 380 27, 380 46, 380 50, G09C 500, G09C 300

Patent

active

049724754

ABSTRACT:
A matrix code generating method generates a first predetermined code in binary form. A second step permutes the first determined code according to a non-linear feedback method described as pseudo-random. The code is segmented with linear segments positioned in a two dimensional matrix array. Apparatus generates and permutes the code, and segments the resultant code into matrix array form. Apparatus encrypts such information onto objects, photo-optically reads such encrypted information and deciphers the coded information.

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Newsweek; Apr. 21, 1986.
M. Neubarth, Popular Science, Apr. 1986, p. 103.

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