Tamper resistant software encoding and analysis
US7506177B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2002 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Sep 22, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates generally to computer software, and more specifically, to a method and system of making computer software resistant to tampering and reverse-engineering. Tampering refers to changing computer software in a manner that is against the wishes of the original author, and is distinct from obscurity techniques which do not change the underlieing data or control flow of a program. Broadly speaking, the method of the invention is to analyse the effectiveness of various encoding techniques by measuring the number of possible decodings corresponding to a given encoded world. This analysis gave rise to a number of new data flow encoding techniques including alternative mixed encoding (a combination of linear and residue number encoding), and multinomial encoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.