SECURE ENVIRONMENT IN A NON-SECURE MICROCONTROLLER

A secure engine method includes providing an embedded microcontroller in an embedded device, the embedded microcontroller having internal memory. The method also includes providing a secure environment in the internal memory. The secure environment method recognizes a boot sequence and restricts use...

Full description

Saved in:
Bibliographic Details
Main Authors Gentili, Maurizio, Panzica, Massimo
Format Patent
LanguageEnglish
Published 04.04.2019
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
Online AccessGet full text

Cover

More Information
Summary:A secure engine method includes providing an embedded microcontroller in an embedded device, the embedded microcontroller having internal memory. The method also includes providing a secure environment in the internal memory. The secure environment method recognizes a boot sequence and restricts user-level access to the secure environment by taking control over the secure environment memory. Taking such control may include disabling DMA controllers, configuring at least one memory controller for access to the secure environment, preventing the execution of instructions fetched from outside the secure environment, and only permitting execution of instructions fetched from within the secure environment. Secure engine program instructions are then executed to disable interrupts, perform at least one secure operation, and re-enable interrupts after performing the at least one secure operation. Control over the secure environment memory is released, which can include clearing memory, re-enabling DMA controllers, and restoring memory controller parameters.
Bibliography:Application Number: US201715721362