The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 2025
Filed:
Sep. 20, 2019
Orange, Issy-les-Moulineaux, FR;
ORANGE, Issy-les-Moulineaux, FR;
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=gh1, g being an element of sub-group G of order b, 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=C(gh3)h2, u and v being random numbers and h2 and h3 being elements of H, and a first fingerprint (gh3); sending to the first device, D and the first fingerprint; computing by the first device (D)', f′=1/f; obtaining based on (D)′ 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.