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. 09, 2024
Filed:
Feb. 24, 2020
Thales Dis France Sas, Meudon, FR;
Aline Gouget, Meudon, FR;
Jan Vacek, Meudon, FR;
THALES DIS FRANCE SAS, Meudon, FR;
Abstract
Provided is a method for generating a digital signature of an input message (M) based on a secret key (d) of a client device having access to a first set and a second set of precomputed data stored in a storage unit. The first set of precomputed data comprises private element parts (k) protected with an homomorphic encryption. The second set of precomputed data comprises public element parts (Q) paired with the private element parts of the first set. Each private element part is a discrete logarithm of the public element part paired therewith. The private element (k), can be homomorphically encrypted, by combining homomorphically encrypted private element parts selected in the first set (k). The selection of the public and private element parts depends on the input message. Other embodiments are disclosed.