Integrated circuit containing a protected memory and secured system using said integrated circuit
US5594793A · kind A · utility
38Cited by
17References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1994 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Oct 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
To provide efficient protection, in reading mode, of the stored data elements, the integrated circuit has an EEPROM type memory and a lock (L) protecting the zone of the memory. The memory contains a read-protected password (PW) and the circuit has means to release the lock (L) if the circuit receives a write command at the address of the password of the same encrypted password (PW). Application notably to electronic systems and instruments using confidential codes, such as car radios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.