Patents by Inventor Herve/ Sizabuire

Herve/ Sizabuire 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).

  • Crytographic system and process and its application
    Patent number: 5001753
    Abstract: The subject of the present invention is a cryptographic system, having two inverse permutations, which can be implemented in a (micro) computer whose data processing resources are relatively limited. The two inverse permutations are processed with one and the same table, and the data zones, before and after permutation, occupy only one and the same memory zone. Applied to the DES cryptographic system, this can in particular be implemented in the memory card for the purpose of ensuring the security of transmissions between the card and a communication system; in particular the card reader of this system.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: March 19, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Marc Davio, Philippe Gautier, Willem Isphording, Jean-Jacques Quisquater, Herve/ Sizabuire