Method and means for producing and analyzing secret identifying

Details Method and means for producing and analyzing secret identifying Method and means for producing and analyzing secret identifying

1984-02-10

1986-12-16

Yusko, Donald J.

Registers

Systems controlled by data bearing records

Credit or identification card systems

34082534, 235489, G06K 1900

Patent

active

046298738

ABSTRACT:
For producing and evaluating secret identification code marks on data carriers of the kind adapted to be scanned by machines specific parameters are recorded in encoded form. In order to reach a high degree of security in respect of fraud or counterfeit without requiring a complicated and expensive production process the identifying parameter is processed in accordance with an unequivocally reversible mathematical rule. The individual parameter may contain an encoded calculation rule. The processing of an identification number contained in the said parameter takes place in accordance with that rule.

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patent: 4025759 (1977-05-01), Scheffel
patent: 4048475 (1977-09-01), Yoshida

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