Integrated circuit for memorizing and processing information confidentially, including an anti-fraud device
US4851653A · kind A · utility
34Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Nov 6, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/1083
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An integrated circuit for memorizing and processing information confidentially, which includes a device for controlling access to its own functions, intended to receive a confidential code, and a time delay circuit imparting a minimum predetermined delay between two attempts at introducing a confidential code even in the event of a power cut of the circuit between attempts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.