Key Chip‑Level Security Technologies for the Internet of Things

IoT systems face severe security risks due to complex deployment environments and limited computational and network resources, making traditional security solutions difficult to apply.

Chip‑level security technologies—such as Trusted Platform Modules (TPM), Secure Boot, Trusted Execution Environments (TEE), memory‑safety mechanisms, and side‑channel protections—provide a foundational defense by integrating security directly into the hardware.

Trusted Computing, driven by the Trusted Computing Group (TCG), uses a hardware root of trust (the TPM and the Core Root of Trust for Measurement, CRTM) to ensure the integrity of the boot process and the operating system, enabling reliable authentication of both users and devices in IoT scenarios.

The trusted computing mechanism builds a chain of trust: a trusted root validates firmware, which validates the bootloader, which validates the OS, and finally the OS provides a trusted runtime for applications, protecting against tampering at every layer.

Modern TPM‑based IoT architectures leverage TPM 2.0 and three major hardware solutions: ARM TrustZone, Intel Trusted Execution Technology (TXT), and AMD Secure Processor (PSP), each creating isolated secure worlds within the SoC.

ARM TrustZone partitions the system into a Secure World and a Normal World, isolating security‑critical code and data from the rest of the platform.

Intel TXT combines specific Intel CPUs, dedicated hardware, and firmware to establish a trusted environment from power‑on, enhancing data integrity and system protection.

AMD PSP provides an independent secure subsystem within the SoC, offering an isolated execution environment for sensitive components and trusted third‑party workloads.

Secure Boot adds cryptographic verification to every boot stage—ROM code, first‑stage bootloader, second‑stage bootloader, and kernel—preventing unauthorized or malicious firmware from executing and safeguarding the device’s startup integrity.

Both ARM TrustZone and AMD implementations incorporate Secure Boot mechanisms to ensure that only authenticated images run in their respective secure worlds, further strengthening IoT device resilience against attacks.