Data processing apparatus, program, and method for testing a secured circuit and maintaining confidentiality of the circuit
US7269529B2 · kind B2 · utility
2Cited by
0References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Nov 30, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31719
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A data processing apparatus that tests whether a secure circuit is normal or not while maintaining confidentiality of the secured circuit is provided: wherein the secured circuit conducts a self-diagnostic test thereof in accordance with a self-diagnostic test start instruction signal from a CPU, and the secured circuit outputs a self-diagnostic test result signal indicating whether the secured circuit is normal or not to the CPU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.