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. 19, 2021
Filed:
Jan. 09, 2018
Idemia Identity & Security France, Issy-les-Moulineaux, FR;
Emmanuel Prouff, Issy les Moulineaux, FR;
Roch Olivier Lescuyer De Chaptal-Lamure, Issy les Moulineaux, FR;
Victor Servant, Issy les Moulineaux, FR;
IDEMIA IDENTITY & SECURITY FRANCE, Illy-les-Moulineaux, FR;
Abstract
A method for encrypting or decrypting a n-tuple of data ({a}) with a n-tuple of secret keys ({k}). The method uses a data-processor to perform the steps of: (a) for each element (a), determining m>n first internal states ({y}) by application of m first operations, each: represented by a table (T), and defined as the combination of a single bijective internal encoding (G), of a non-linear sharing function (D, E, F. . . ), and of a given non-linear permutation function (ƒ) parameterized with the secret key (k), and (b) for each n-tuple of first internal states ({y}), determining a second internal state (z) by application of a second operation: represented by a table (T), and defined as the combination of a second single bijective internal encoding (G), a linear multiplexing function (L), and the inverses of the first bijective internal encodings (G).