System and method of interlocking to protect software-mediated program and device behaviours
US10402547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2015 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Sep 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for rendering a software program resistant to reverse engineering analysis. At least one first expression in a computational expression or statement of the software program is replaced with a second expression. The first expression being simpler than said second expression and the second expression being based on a value or variables found in said first expression. The second expression produces a value which preserves the value of said first expression. The conversion of the first expression is performed according to a mathematical identity of the form Σi=1k ai ei=E, where ai, are coefficients, ei, are bitwise expressions, whether simple or complex, and E is said first expression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.