发明名称 |
A METHOD FOR THE DETECTION OF AUTHENTICITY IN A DATA CARRIER AND APPARATUS FOR APPLYING SAID METHOD |
摘要 |
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) first in a calibration operation, in which the radiation intensity is adjusted, then in a reading operation at another position of the data carrier. 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. |
申请公布号 |
ZA8107050(B) |
申请公布日期 |
1982.09.29 |
申请号 |
ZA19810007050 |
申请日期 |
1981.10.13 |
申请人 |
COPYTEX 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 |
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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