公开(公告)号：US20240176863A1

公开(公告)日：2024-05-30

申请号：US18514795

申请日：2023-11-20

Applicant: STMicroelectronics (Rousset) SAS ,  STMicroelectronics (Grand Quest) SAS ,  STMicroelectronics (Alps) SAS

Inventor： Fabrice Cheruel ,  Dragos Davidescu ,  Nicolas Anquet

IPC: G06F21/44 ,  G06F21/71

CPC classification number: G06F21/44 ,  G06F21/71

Abstract: The system-on-chip includes at least one microprocessor domain including a microprocessor and at least one resource; and a resource isolation system including a filtering circuit for each resource and configured to detect a security, privilege and compartmentalization access rights violation for the resource, by transactions arriving at the resource. The filtering circuit is configured, in the event of a violation of at least one access right to the resource by a transaction, to generate a first error signal representative of the violated access right to the resource, and a second error signal representative of at least one access right of this transaction.

公开(公告)号：US20230069651A1

公开(公告)日：2023-03-02

申请号：US17822272

申请日：2022-08-25

Applicant: STMicroelectronics (Grand Quest) SAS

Inventor： Franck Albesa

IPC: G06F21/57 ,  G06F9/30

Abstract: A method includes protecting a boot sequence of a processing device by incrementing a counting value generated by a monotonic counter, then a first time period after the beginning of the boot sequence, comparing, by the protection circuit, the counting value with a first reference value, and, if the counting value is smaller than the first reference value, changing, by the protection circuit, the counting value to the first reference value.