Anti-tampering obscurity using firmware power mirror compiler
US8384413B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2011 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Feb 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/755
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a preferred embodiment of the invention, a mirror compiler is provided for each protected device or circuit resulting in a program that is embedded into the protected device's source code. The mirror compiler can be configured to have multiple selectable compilation parameters offering the programmer flexible options for mirrored power cancellations.In the preferred embodiment, the mirror compiler comprises a digital-to-analog converter and a digital-to-analog load to sink current. These elements serve to define a complement of the normal (i.e., unprotected) programmed device's output current. The digital-to-analog load currents are output and thus act to cancel the expected variations in the currents of the protected programmed device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.