Integrated circuit for the confidential storage and processing of data, comprising a device against fraudulent use
US4813024A · kind A · utility
25Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1987 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Jun 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/1083
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fraud-preventive device for a memory card comprising an EPROM type or similar non-volatile memory designed to receive confidential authorization data as well as the results, wrong or otherwise, of tests on the authorization data, comprises a single simulation cell designed to record the non-erroneous results, this cell consuming the same current as a memory cell, which has never been programmed, of the memory part designed to record the wrong data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.