Trusty TEE

- [Instructor] We've looked at the concept…of hardware-backed security…running in a trusted execution environment, or TEE.…The use of a TEE in Android isn't new.…Android has used the TEE since Version 3.0…to support its digital rights management framework.…Trusty TEE is a set of software components…provided by the Android Open Source Project…which support the use of a TEE on Android mobile devices.…It consists of the Trusty operating system…and Android libraries and associated drivers…to enable communication with trusted applications…executed within the Trusty OS.…

Trusty provides APIs for developing…two classes of applications,…trusted applications that run in the TEE…and standard applications that need to use services…provided by TAs running in the TEE.…Applications for the Trusty OS…are written as single-threaded C programs…using a small Trusty C library.…They're written as event-driven servers…triggered by a request from another TA…or from a standard app via the Trusty interface.…Access to TA services by a standard Android app…