TrustZone technology for Armv8-A

Architecture of Trusted Execution Environment Information Slide.

Arm TrustZone is used on billions of applications' processors to protect high-value code and data. It is frequently used to provide a security boundary for a GlobalPlatform Trusted Execution Environment.

TrustZone is built on Secure and Non-secure worlds that are hardware separated. The partitioning of the two worlds is achieved by hardware logic present in the AMBA bus fabric, peripherals and processors.

In order to implement a Secure state in the SoC, trusted software (Trusted OS) needs to be developed to make use of the protected assets. This code typically implements trusted boot, the Secure world switch monitor, a small trusted OS and trusted apps. The combination of TrustZone based hardware isolation, trusted boot and a trusted OS make up a Trusted Execution Environment (TEE), which can be used alongside other security technology.

Learn more about the GlobalPlatform TEE.


Supporting documentation and resources for developing with TrustZone for Armv8-A

Architecture overview

Documentation demonstrating the fundamentals to the Armv8-A architecture.

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Specification library

Specifications and technical documents, which are subject to the Global Platform TEE.

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TrustZone-based TEE and FIDO authentication

White paper explaining how to secure the future of authentication with Arm TrustZone-based Trusted Execution Environment (TEE) and Fast Identity Online (FIDO).


Software and tools

Explore software and tools available from Arm to maximize the capabilities of your TrustZone-enabled device

Arm Development Studio

Flagship embedded tool suite where multicore scalability meets enhanced productivity, enabled by CMSIS.

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Trusted Firmware-A

Trusted Firmware-A (TF-A) provides a reference implementation of Secure world software for Armv7-A and Armv8-A.

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Explore training materials for TrustZone, delivered by the world's most experienced Arm technology trainers

Arm TrustZone technology training

This course provides platform developers a complete overview of designing trusted systems with Arm TrustZone, introducing the privilege model and memory separation features of the Armv8-A architecture.

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TrustZone forArmv8-A

This course provides an insight into the purpose and functionality of Arm TrustZone for Armv8-A technology, explaining some of the use cases for TrustZone and the architectural features.

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