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. 26, 2021
Filed:
Dec. 02, 2015
Commissariat a L'energie Atomique ET Aux Energies Alternatives, Paris, FR;
Hassan Noura, Beirut, LB;
Damien Courousse, Grenoble, FR;
Abstract
A method of encrypting messages in clear with the aid of a secret key, the method of encryption implementing at least one substitution layer using a substitution table and a diffusion layer using a diffusion matrix, the substitution layer and/or the diffusion layer being configured in a dynamic manner by a control parameter obtained by combining the secret key with the output word from a counter and by performing a non-invertible transformation on the combination. The counter is incremented at least once between two successive plaintext messages. The configuration of the substitution layer is manifested by an identical permutation of bits of each element of the substitution table and the configuration of the diffusion layer is manifested by a permutation of the elements of the diffusion matrix.