Arm® trustzone®

Abstract

Millions of mobile devices are built around processors and systems–on–chip (SoCs) based on ARM® processor designs. The success of the ARM architecture is due in no small part to the fact that ARM only designs and licenses the base IP for SoCs: the company does not make or sell finished chips. Device makers in search of SoCs for their designs generally benefit from this model as they have a wide choice of products and vendors to choose from while enjoying the efficiency and reliability of standardized tool chains, low–level compatibility and a broad developer ecosystem. However in the area of security ARM–based devices were not always consistent or compatible, so ARM created TrustZone to provide a portable architecture–level security feature for the ARM community to build upon.