Designing Secure IoT Devices with the Arm Platform Security Architecture and Cortex-M33

Chapter 9: Building a defense with the PSA security model

Abstract

In order to meet the threat of a software attack, the Platform Security Architecture (PSA Certified) defines an abstract security model that can be applied to any Cortex-M processor. This chapter will provide an introduction to the security model and its objectives. In the rest of this book, we will see how to implement this model using a Cortex-M33 microcontroller. The PSA security model defines 10 security goals required to create a robust IoT device.

Keywords

PSA security model; IoT device; Cortex-M33; Immutable RoT; Boot seed; Encryption; Secure execution environment; Nonsecure environment

Introduction

In order to meet the threat of a software attack, the Platform Security ...