Hardware-based secure code authentication
US7194626B2 · kind B2 · utility
8Cited by
21References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Apr 14, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/575
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides for authentication of code, such as boot code. A memory addressing engine is employable to select a portion of a memory, as a function of a step value, as a first input hash value. The step value allows for the non-commutative cumulative hashing of a plurality of memory portions with a second input hash value, such as a previous hash value that has been rotated left. An authenticator circuit is employable to perform a hash upon the portion of memory and the second input hash value. A comparison circuit is then employable to compare an output of the authenticator circuit to an expected value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.