Method to secure a software code
US11256786B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 25, 2018 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Mar 14, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/1066
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to method of securing a software code comprising at least one constant value, said method generating a secure software code and comprising the steps of: —determining (S1) by a processor in the software code a constant value to be protected, —inserting (S2) by the processor in the software code an indexed array of values such that the constant value to be protected can be determined from one value of the array, —replacing (S3) by the processor in the software code the constant value to be protected by a replacement variable, —inserting (S4) by the processor in the software code a first sequence of instructions which, when executed at runtime: •computes the index in the array of the value from which the constant value to be protected can be determined, •extracts from said array the value located at said computed index in said array, •from said extracted value, determines the constant value to be protected, •sets the value of said replacement variable equal to the determined constant value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.