Tamper-proof card associating a high storage density information medium with a microcircuit, and its use in a card reader
US5175424A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Mar 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/084
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The card has a plastic support bearing, on at least one part of its surface, a layer of recording material and a microcircuit inserted in the plastic support. The card is made tamper-proof by the setting up of an identifier code that is characteristic of the relationship between the microcircuit and the support bearing the recording layer. This code is, firstly, recorded in the memory of the microcircuit and, secondly, detectable by analysis of the support. Any detachment of the support and of the microcircuit in which the related code has been memorized prevents the checking of the two codes by coincidence. The invention can be applied notably to high storage density cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.