Gaping 'hole' in Qualcomm’s Secure World mobile vault

The Armv8-M architecture extends TrustZone to Cortex-M, enabling robust levels of protection. TrustZone for Armv8-M has the same high-level features as TrustZone on application processors, with the key benefit that switching between Secure and Non-secure worlds is done in hardware for faster transitions and improved power efficiency. Learn more Trusted Execution Environments and Arm TrustZone | Azeria Labs In TrustZone terminology, this entire environment is referred to as the Rich Execution Environment (REE). By contrast, the TrustZone virtual core hosts and runs a Trusted Execution Environment (TEE) in the “Secure World” (SWd). In practice, TrustZone virtual cores are implemented by fast context switching performed inside the Secure Monitor. linux kernel - Handling ARM TrustZones - Stack Overflow It can access normal world CP15 registers while still having the sytem memory view of the secure world (will push the NS bit as 0). How to enable the TrustZone in ARM. Enable is a bit of an overloaded word. It is built into the CPU as unixsmurf points out. By default TrustZone enabled CPUs will boot in the secure world.

ARM’s TrustZone introduces a new mode: the secure monitor mode. When operating in this new mode, the CPU is in the Secure World and can access all of the device’s peripherals and memory. When not operating in this mode, the CPU is in the Non-Secure World and only a subset of peripherals and specific ranges of physical memory can be accessed.

Dec 28, 2017

How the HTC Exodus Blockchain Phone Plans to Secure Your

secure software modules, called Trusted Apps (TAs), which are dynamically loaded and executed in TrustZone. As shown in Figure 1, transition of execution from the non-secure world to the secure world must be handled by a component that runs in secure monitor mode. The monitor component guarantees the context of the secure world to