Patents by Inventor Bernard Delayaye

Bernard Delayaye 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).

  • Substitution permutation enciphering device
    Patent number: 4751733
    Abstract: A substitution-permutation enciphering device.This device, adapted for transforming a binary word into another binary word, by a succession of substitutions and permutations, under the control of a key, is such that the substitution operations are performed by means of programmable or reprogrammable memories addressed by all or part of the word to undergo substitution, and by all or part of the key or of the parts of the key applied successively.
    Type: Grant
    Filed: May 14, 1986
    Date of Patent: June 14, 1988
    Assignee: Thomson-CSF
    Inventors: Bernard Delayaye, Alain Lebret