The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2021
Filed:
Jun. 01, 2017
Gemalto SA, Meudon, FR;
Sylvain Leveque, Gemenos, FR;
THALES DIS FRANCE SA, Meudon, FR;
Abstract
The present invention relates to a method to intrinsically protect a computer program having a driving value dedicated to handle sensitive data, said driving value comprising a plurality of N computation units to perform computations using sensitive data and susceptible to let sensitive data leak, each unit having V possible values, said method comprising a step of unrolling k parts of P units, with P>1 and P<N and N≥P*k, by rewriting them in an equivalent sequence of computations protecting the sensitive data, said unrolling step resulting in a plurality of V{circumflex over ( )}P possible parts of P units, said method further comprising the step of introducing, in the finally executed computer program, instructions to dynamically execute the driving value by selecting, at end of each executed part, the next part to be executed among the possible parts.