公开(公告)号：US20240320086A1

公开(公告)日：2024-09-26

申请号：US18612421

申请日：2024-03-21

Applicant: STMicroelectronics International N.V.

Inventor： Pierre-Alexandre BLANC ,  Gilles VAN ASSCHE

IPC: G06F11/10 ,  G06F21/60

CPC classification number: G06F11/1004 ,  G06F11/1068 ,  G06F21/602

Abstract: The present description concerns a method of checking a first data element, executed by an electronic device comprising a processor and a memory, wherein said first data element is not stored in said memory and is divided in N second data elements independent from the first data element, each second data element being stored in said memory, and a result of an application of a XOR function to the N second elements being equal to the first data element, wherein an image of the first data element by a CRC function linear with respect to the XOR function is stored in said memory, and said method comprising a step, executed by said processor, of checking if said image of the first data element by said CRC function is equal to an application of the XOR function to the images of N second elements by said CRC function.

公开(公告)号：US20250132893A1

公开(公告)日：2025-04-24

申请号：US18910731

申请日：2024-10-09

Applicant: STMicroelectronics International N.V.

Inventor： Pierre-Alexandre BLANC ,  Benjamin SARTORI

IPC: H04L9/06 ,  G06F7/58

Abstract: The present description concerns a method of verification, implemented by an electronic device, of a matrix used for the implementation of a data cipher algorithm comprising, for the generation of the matrix, the use of a first function and of a second function, the verification method comprising a verification using a final portion of the output data of the first function.