Memory device having secure non-volatile locking functionality
US7962713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2003 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jun 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/6209
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device and method is provided for maintaining, upon unlocking of a memory, the lock status of the memory prior to the memory being unlocked and recreating the lock status when power is turned on again. An information storage device, such as a memory card, performs unlocking of a memory in response to a command input from an information processing apparatus and stores lock status data prior to the memory being unlocked in a non-volatile memory (NVM). When the information storage device is turned off and then on, the information storage device recreates a lock status of the memory on the basis of the lock status data stored in the storage means and performs memory access control based on the recreated lock status.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.