Method for checking the integrity of a program or data, and apparatus for implementing this method
US5442645A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Oct 24, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and apparatus for checking the integrity of a message such as a program and/or data against an original message supposed to correspond to it. By using an algorithm (A) on at least part of the original message, at least one signature (S1, S2, . . . Sm) of this part is calculated and memorized in a memory area (10) of a portable object (1) which also has processing circuits (11) able to implement algorithm (A). In order to check the integrity of a message, at least one signature of a message part is calculated by the processing circuits (11) of the portable object by implementing the algorithm (A) and is compared to an original message signature supposed to correspond, and memorized in memory area (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.