Patent · US Active

Obfuscating computer program code

US8393003B2 · kind B2 · utility

11Cited by

1References

14Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Johan Eker · Lund, SE
Björn Johansson · Lund, SE
Carl Von Platen · Malmö, SE

Key dates

Filing date	Nov 20, 2007
Grant date	Mar 5, 2013
Priority date	—
Expiry date	Jan 1, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG06F21/14
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A computer-implemented method of tamper-protecting computer program code. The method comprises: obtaining an input representation of the computer program code; identifying a conditional program statement for causing a data processing system to selectively execute one of at least a first and a second sets of program statements when said computer program is executed by a data processing system; replacing said identified conditional program statement and the first and second sets of program statements with a set of transformed program statements to obtain obfuscated program code, wherein the set of transformed program statements is adapted to cause the data processing system to execute at least a part of each of the transformed program statements when said computer program is executed by the data processing system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.