Control function with multiple security states for facilitating secure operation of an integrated system
US7089419B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2002 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Jul 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique is provided for facilitating secure operation of an integrated system. The technique includes passing a request for data through a data access controller incorporated within the integrated system, and selectively qualifying the request in accordance with a security state of the controller. The security state of the controller is one state of multiple possible security states, including a null state and a secured state. In the secured state, the controller replaces a standard boot code address associated with a request for boot code with a substitute boot code address. The substitute boot code address addresses an encrypted version of boot code, which is then decrypted by the controller employing a master key set held at the controller. When transitioning to the null state, the master key set is erased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.