Trusted and OP-TEE (Open Portable Trusted Execution Environment) are two different boot schemes used in secure systems.
Trusted boot is a security mechanism that verifies the integrity of a device's firmware and software during boot-up. It ensures that the system boots with only trusted and verified components, preventing any malicious code from executing at boot time. Trusted boot relies on a chain of trust, where each component verifies the next before allowing it to execute.
On the other hand, OP-TEE is a secure environment that runs in a separate, isolated part of the system's memory, typically referred to as the Trusted Execution Environment (TEE). OP-TEE provides a secure execution environment for sensitive operations such as cryptography and secure storage. It also enables secure interprocess communication between normal world (NW) and secure world (SW) components.
While both trusted boot and OP-TEE aim to enhance the security of a system, they operate at different levels of the system. Trusted boot focuses on ensuring that only trusted and verified components are loaded during boot-up, while OP-TEE provides a secure environment for executing sensitive operations.
