G - Physics – 11 – B
Patent
G - Physics
11
B
352/19.6
G11B 27/36 (2006.01) G06K 5/00 (2006.01) G06K 7/10 (2006.01) G06K 19/14 (2006.01) G07F 7/08 (2006.01)
Patent
CA 1189184
A B S T R A C T The present invention specifies a method for the verification of authenticity in a data carrier (1) by measuring permeability to an electromagnetic radiation in at least one region of the data carrier (1). Perme- ability is scanned over a regional area of the data carrier by means of a radiation detector (7). The output signal of the detector (7) is coded and co- inscribed as additional information in a store of the data carrier with the information data during the initial inscribing of these data. In the reading and authenticity check scanning operation this information is compared with a corresponding additional information stored during the original data inscription.
387704
Bauer Siegfried
Stockburger Hermann
Copytex G.m.b.h. Sicherheitssysteme
Goudreau Gage Dubuc
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