Patents by Inventor Sebastien Aumonier

Sebastien Aumonier 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 for determining the cofactor of an elliptic curve, corresponding electronic component and computer program product
    Patent number: 9049021
    Abstract: A method and apparatus are proposed for cryptographic computations implemented in an electronic component. The method includes determining the cofactor of an elliptic curve E defined over a finite field Fq with q elements, the elliptic curve comprising a base point P having an order equal to n. The step of determining includes determining a value of floor((q+2ceil(b/2)+1+1)/n) when n>6?q, where the function ceil corresponds to the ceiling function, floor corresponds to the floor function, and b corresponds to the size q in number of bits of q.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: June 2, 2015
    Assignee: OBERTHUR TECHNOLOGIES
    Inventors: Emmanuelle Dottax, Sebastien Aumonier