Secure code authentication
US8140824B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2007 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jan 4, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer program product comprises a computer useable medium having a computer readable program 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.