Trusted Execution Environment for Smart Edge Device Privacy

The patent segments the data processing architecture into distinct trusted execution environments (TEEs) on both edge devices and backend servers. Each TEE is an isolated secure enclave that prevents privileged users and compromised system software from accessing encrypted data, even when they have control over the host system. This segmentation creates multiple security boundaries that conventional single-layer encryption cannot provide.

The patent introduces TEEs as intermediary secure processing zones between the untrusted host systems and the sensitive data. These TEEs act as mediators that perform cryptographic operations and data processing in isolated environments, ensuring that even if the host system is compromised, the privileged users cannot access the data within the TEE boundaries.

The patent implements preliminary actions by establishing TEEs and configuring hardware security modules before data processing begins. The TEEs are pre-configured with security policies, cryptographic keys, and integrity verification mechanisms. This preliminary setup ensures that from the moment data enters the system, it is protected within a secured environment that provides forensic proof of anti-tampering, without requiring complex post-processing security measures.

The patent merges encryption, integrity verification, and authentication functions into the unified TEE architecture. Instead of implementing separate security mechanisms for transmission, storage, and processing, the TEE combines these functions into a single integrated secure environment, providing both reduced implementation complexity and robust forensic proof of anti-tampering simultaneously.

The TEE acts as an intermediary that provides controlled access to data. Privileged users and system software can request data processing through the TEE interface, and the TEE verifies their authorization before allowing access. This intermediary mechanism maintains ease of operation by preserving legitimate access paths while blocking unauthorized access attempts, solving the contradiction between accessibility and security.

The patent applies local quality by creating different access characteristics for different data regions. Data within the TEE has restricted access properties that prevent unauthorized reading or modification, while data outside the TEE or in authorized contexts maintains normal accessibility. This local differentiation of security properties allows privileged users to operate efficiently on authorized data while providing strong security where needed.