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:
Sep. 06, 2022
Filed:
May. 04, 2020
Stmicroelectronics (Grenoble 2) Sas, Grenoble, FR;
Stmicroelectronics (Rousset) Sas, Rousset, FR;
Fabien Journet, Grenoble, FR;
Yanis Linge, Fuveau, FR;
STMICROELECTRONICS (GRENOBLE 2) SAS, Grenoble, FR;
STMICROELECTRONICS (ROUSSET) SAS, Rousset, FR;
Abstract
A method and device for protecting encrypted data are disclosed. In an embodiment an integrated circuit includes a secure module including a first register containing a first mask and a second register containing masked data, the first mask and the masked data forming a secret key and a processor configured to generate a second mask and mask the secret key with the second mask when the secret key is not used for an encryption operation and during reception of a validation signal, wherein the first and second registers are disposed in the secure module so that the outputs of the registers are not simultaneously optically viewable.