Patents by Inventor Florian Bourse

Florian Bourse 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).

  • Cryptographic method of secure comparison of two secret data x and y
    Patent number: 12192354
    Abstract: A cryptographic method including: generating by a first device having a datum x an RSA module N; computing by the first device a number C=gbaxh1, g being an element of sub-group G of order bd, h1 being an element of sub-group H of order f, and a, b, d, f being integers, b and f being mutually prime, and x and y being less than d/a; sending C to a second device having datum y; computing by the second device D=Cu·bd?ay(gh3)vh2, u and v being random numbers and h2 and h3 being elements of H, and a first fingerprint (gh3)v; sending to the first device, D and the first fingerprint; computing by the first device (Df)f?, f?=1/f; obtaining based on (Df)f? a second fingerprint; and determining whether x is greater than or equal to y or x is less than y by comparing the first and the second fingerprints.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: January 7, 2025
    Assignee: ORANGE
    Inventors: Florian Bourse, Olivier Sanders, Jacques Traore
  • Cryptographic method of secure comparison of two secret data x and y
    Publication number: 20220038277
    Abstract: A cryptographic method including: generating by a first device having a datum x an RSA module N; computing by the first device a number C=gbaxh1, g being an element of sub-group G of order bd, h1 being an element of sub-group H of order f, and a, b, d, f being integers, b and f being mutually prime, and x and y being less than d/a; sending C to a second device having datum y; computing by the second device D=Cu·bd?ay(gh3)vh2, u and v being random numbers and h2 and h3 being elements of H, and a first fingerprint (gh3)v; sending to the first device, D and the first fingerprint; computing by the first device (Df)f?, f?=1/f; obtaining based on (Df)f? a second fingerprint; and determining whether x is greater than or equal to y or x is less than y by comparing the first and the second fingerprints.
    Type: Application
    Filed: September 20, 2019
    Publication date: February 3, 2022
    Inventors: Florian Bourse, Olivier Sanders, Jacques Traore