Patents Assigned to Gegemplus
  • Countermeasure method in an electric component using a secret key cryptographic algorithm
    Patent number: 6820814
    Abstract: An electronic component uses a secret key cryptographic algorithm that employs several successive computing cycles to supply final output data from initial input data applied at the first cycle. A first random value is applied to a computation conducted for each cycle, to obtain unpredictable output data. A second random value as also applied to the initial input data that is used for the input of the first cycle.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: November 23, 2004
    Assignee: Gegemplus
    Inventor: Olivier Benoit