发明名称 |
Method for protection against the re-transfer of uniquely recorded information on a data carrier and apparatus for recording and/or reading re-transfer-protected information |
摘要 |
A method of safeguarding against the re-transfer of uniquely recorded information on a data carrier (1) includes the recording of the information data and in addition thereto a simultaneously recording of an additional information on the data carrier (1) which reflects co-ordination characteristics relative to the data carrier. In order to carry out the method an apparatus is provided for recording and/or reading a re-transfer protected information on a data carrier (1) with a recording and/or reading device (4). The apparatus comprises a device (13) for detecting measurable properties (3) which are present at singular points of the data carrier (1) and for producing an additional information characterizing such properties.
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申请公布号 |
US4649265(A) |
申请公布日期 |
1987.03.10 |
申请号 |
US19850707583 |
申请日期 |
1985.03.04 |
申请人 |
COPYTEX GMBH SICHERHEITSSYSTEME |
发明人 |
STOCKBURGER, HERMANN;BAUER, SIEGFRIED |
分类号 |
G11B5/80;B42D15/10;G06K7/00;G06K7/08;G06K17/00;G06K19/10;G07F7/02;G07F7/08;G07F7/12;G11B20/10;G11B23/34;(IPC1-7):G06K15/02 |
主分类号 |
G11B5/80 |
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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