Patents by Inventor Charles J. Saada

Charles J. Saada 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).

  • Process and apparatus for authenticating the signature of a signed message
    Patent number: 4656474
    Abstract: A process and a device for authenticating the signature of a signed message includes a nominal signature card (1a) coupled to a transmitting device 1 which sends signed messages. The card (1a) includes at least one memory (5) in which there are secretly prerecorded at least one secret key (S) and one program (P) which automatically processes the signature of a message (M), as well as circuits (6) for computing the signature (SG). A control card (3b), which is not nominal, is coupled to a device (3) for receiving signed messages. The card (3b) includes at least one memory in which there are secretly prerecorded at least the secret key (S) and the program (P) for recomputing via processing circuits (15) the signature (SG) of the received message (M).
    Type: Grant
    Filed: November 20, 1985
    Date of Patent: April 7, 1987
    Assignee: Compagnie Internationale pour l'Informatique Cii-Honeywell Bull (Societe Anonyme)
    Inventors: Jean H. Mollier, Charles J. Saada