Method for protecting a software using a so-called...

G - Physics – 06 – F

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G06F 1/00 (2006.01) G06F 21/00 (2006.01)

Patent

CA 2454095

The invention concerns a method for protecting, from a unit, a vulnerable software against its unauthorised use, said software operating on a data processing system. The method consists in creating a protected software: by selecting in the vulnerable software source, at least a conditional jump; by modifying the vulnerable software source so that a second part of the execution executed in a unit executes at least the functionality of at least a selected conditional jump and provides the data processing system with an information enabling to track the execution at the selected site.

L'invention concerne un procédé pour protéger, à partir d'une unité, un logiciel vulnérable contre son utilisation non autorisée, ledit logiciel vulnérable fonctionnant sur un système de traitement de données. Le procédé consiste à créer un logiciel protégé : - en choisissant dans le source du logiciel vulnérable, au moins un branchement conditionnel, - en produisant le source du logiciel protégé à partir du source du logiciel vulnérable, en modifiant le source du logiciel vulnérable de manière qu'une seconde partie d'exécution exécutée dans une unité exécute au moins la fonctionnalité d'au moins un branchement conditionnel choisi et met à la disposition du système de traitement de données une information permettant la poursuite de l'exécution à l'endroit choisi.

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