• Introduction
• Architecture
• Directory Structure

The itrustee_ree_lite module provides a set of rich execution environment (REE) API components for interacting with iTrustee-developed TEEOS, including tzdriver (driver), libteec (API library), and teecd (agent service). libteec meets the GlobalPlatform (GP) standards and provides ClientApp (CA) APIs.

The following figure shows the itrustee_ree_lite architecture.

• tzdriver: enables switching and communication between the REE and trusted execution environment (TEE) and provides device nodes that can be accessed from the application layer.

• libteec: provides CA GP APIs for accessing device nodes and establishing communication sessions with the TEE.

• teecd: provides agent services for TEEOS, such as file operations.

Table 1 Directory structure of itrustee_ree_lite