Understanding hardware security

- [Narrator] Many modern microcontrollers…include an area of the chip dedicated to secure processing.…In the case of the ARM architecture,…this is called the TrustZone, and is intended…to be used by device manufacturers…to provide hardware backed security capabilities.…While some early implementations dedicated…a physical process to the security processing,…this is no longer necessary.…Now each physical processor core in the microcontroller…provides two virtual cores, a non-secure and a secure core,…and a mechanism to contact switch between them.…

The security state is encoded on the system bus…as a 33rd bit, and this enables integration…of the virtual processors into the overall system security…so that the non-secure virtual processor…can only access non-secure system resources,…but the secure virtual processor can see all resources.…The emerging standard for secure development components…of embedded systems such as mobile phones…and IoT devices, is the…GlobalPlatform Trusted Execution Environment standard.…