Patents by Inventor Jacques Jean-Alain Fournier

Jacques Jean-Alain Fournier has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of dynamic protection of data during the execution of a software code in intermediate language in a digital apparatus
    Patent number: 8646092
    Abstract: The invention concerns a method for protecting the data of an application compiled in intermediate for execution executed on a digital apparatus equipped with a virtual machine managing the execution of the code via a execution stack defining at least one stack frame corresponding to a method called during the execution of the code. A secured execution mode of the code involves the determination of at least one global checksum associated with each stack frame and, each time that a datum of the code is manipulated, the calculation of a local checksum associated with that datum. The calculation is on one hand, on the global checksum associated with the stack frame corresponding to the manipulated datum and, on the other hand, on at least one part of the other data constituting the stack frame.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: February 4, 2014
    Assignee: Gemalto SA
    Inventors: Benoit Gonzalvo, Jacques Jean-Alain Fournier
  • METHOD OF DYNAMIC PROTECTION OF DATA DURING THE EXECUTION OF A SOFTWARE CODE IN INTERMEDIATE LANGUAGE IN A DIGITAL APPARATUS
    Publication number: 20090328231
    Abstract: The invention concerns a method for protecting the data of an application compiled in intermediate for execution executed on a digital apparatus equipped with a virtual machine managing the execution of the code via a execution stack defining at least one stack frame corresponding to a method called during the execution of the code. A secured execution mode of the code involves the determination of at least one global checksum associated with each stack frame and, each time that a datum of the code is manipulated, the calculation of a local checksum associated with that datum. The calculation is on one hand, on the global checksum associated with the stack frame corresponding to the manipulated datum and, on the other hand, on at least one part of the other data constituting the stack frame.
    Type: Application
    Filed: July 18, 2007
    Publication date: December 31, 2009
    Applicant: GEMALTO SA
    Inventors: Benoit Gonzalvo, Jacques Jean-Alain Fournier