Authenticating pseudo-random code and apparatus
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United States of America Patent
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Nov 20, 1990
Issued Date -
N/A
app pub date -
Feb 3, 1989
filing date -
Feb 10, 1987
priority date (Note) -
Expired
status (Latency Note)
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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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