Method of and circuit for preventing the alteration of a stored data value
US8502555B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2012 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Jun 28, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/225
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
According to an embodiment, a method of preventing the alteration of a stored data value is disclosed. The method comprises coupling a first electronic fuse to an output control circuit; coupling a second electronic fuse to the output control circuit; decoding the states of the first electronic fuse and the second electronic fuse after a first processing step to generate a first decoded state; and decoding the states of the first electronic fuse and the second electronic fuse after a second processing step to generate a second decoded state different from the first decoded state; wherein the output control circuit maintains the second decoded state after an attempt to alter a state of an electronic fuse of the first electronic fuse and the second electronic fuse. A circuit for preventing the alteration of a stored data value is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.