Methods used in a secure memory card with life cycle phases
US8108691B2 · kind B2 · utility
7Cited by
98References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 22, 2005 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | May 25, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C5/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A secure memory card with encryption capabilities comprises various life cycle states that allow for testing of the hardware and software of the card in certain of the states. The testing mechanisms are disabled in certain other of the states thus closing potential back doors to secure data and cryptographic keys. Controlled availability and generation of the keys required for encryption and decryption of data is such that even if back doors are accessed that previously encrypted data is impossible to decrypt and thus worthless even if a back door is found and maliciously pried open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.