Azeria Labs: Understanding TEEs and Arm TrustZone

This post is the first part of a larger series and aims to ease the process of getting started with TrustZone security research. If you ever wondered how Trusted Execution Environments on modern Android phones work and want to learn about their attack surface, you will find enough information in this series to get you started. In this introduction post, you will learn what the TrustZone technology is and what Trusted Execution Environments (TEE) are for. You can use this post as a reference for TrustZone and TEE concepts you don’t understand or remember when reading the follow-up posts.[…]