Use of EEPROM for storage of security objects in secure systems
US6968420B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2002 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Jun 1, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/318533
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit generally comprising a first memory, a second memory and a processor is disclosed. The first memory may store an instruction to read an updated security value of at least three security values. The second memory may store (i) the updated security value and (ii) information related to security of the circuit. The processor may be configured to (i) execute the instruction while a register stores a highest security value of the security values, (ii) copy the information from the second memory to a third memory in response to the update security value being greater than a current security value of the security values stored in the third memory and (iii) ignore the information in the second memory in response to the updated security value being no greater than the current security value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.