In the rapidly evolving digital world, security and privacy are (or at least should be) more important than ever. The proliferation of digital devices and the increasing velocity of sensitive data have necessitated the development of better and more secure ways of protecting information. A Trusted Execution Environment (TEE) is one such solution, providing additional authenticable security for devices and applications. This talk will explore what a TEE is, what types exist, how they work, and their benefits and limitations. We will then consider the use case of rebuilding trust in women’s health tracking apps using TEEs.