System-on-Chip Implementation of Trusted Execution Environment with Heterogeneous Architecture

Abstract

This poster presents a Trusted Execution Environment (TEE) hardware implementation based on a heterogeneous architecture. The TEE verifies the integrity of software applications based on a chain of trust with the initial authentication. The chain-of-trust is implemented in software, using TEE hardware crypto-processors. The initial authentication is called the Root-of-Trust (RoT), and the isolated 32-bit system handles it. On the peripheral bus, there are several cryptography accelerators implemented such as SHA- 3, ED25519, AES, and a True Random Number Generator (TRNG). The TRNG module has not only the public channel over the peripheral bus but also a special private channel just for the isolated core. The proposed system was implemented in a 5mm x 5mm die by the 180-nm ROHM process library.