Physically Unclonable Functions as a Solid Foundation of Platform Security Architecture

By _arm - arm Blogs

November 5, 2018

Introduction

Today, there is general agreement amongst most stakeholders that IoT is not going to take off and reach its full potential unless we come up with a solid approach to securing both the “Things” in IoT and the communication between them. An Arm-led initiative which is specifically relevant to device OEMs and silicon manufacturers is the Platform Security Architecture or PSA. PSA is a framework that aims to secure a trillion connected devices by providing a scalable and hardware-backed approach to threat analysis, system architecture and reference implementations for IoT devices.

In this article we will show how SRAM PUF technology is a very good fit to some of the most fundamental PSA objectives. In particular it enables a strong and flexible protection for the heart of the Root of Trust: the immutable Root of Trust – the part that stays unchanged over the lifetime of a device.

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