发明名称 |
METHOD FOR THE DETECTION OF AUTHENTICITY IN A DATA CARRIER AND APPARATUS FOR APPLYING SAID METHOD |
摘要 |
<p>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). Permeability 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 coinscribed 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.</p> |
申请公布号 |
CA1189184(A) |
申请公布日期 |
1985.06.18 |
申请号 |
CA19810387704 |
申请日期 |
1981.10.09 |
申请人 |
COPYTEX G.M.B.H. SICHERHEITSSYSTEME |
发明人 |
STOCKBURGER, HERMANN;BAUER, SIEGFRIED |
分类号 |
G11B20/18;B42D15/10;G06K5/00;G06K7/00;G06K7/08;G06K7/10;G06K17/00;G06K19/10;G06K19/14;G07F7/08;G11B23/34;(IPC1-7):G11B27/36 |
主分类号 |
G11B20/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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