Smart Contract TEE for Restorable Personal Data Processing

The patent applies preliminary action by establishing a trusted execution environment (TEE) before personal information is de-identified. The TEE pre-configures secure storage areas and access control mechanisms that will preserve restoration capability. Encryption keys are generated and stored within the TEE in advance, ensuring that even after de-identification, the original information can be restored when needed, thus resolving the contradiction between privacy protection and restoration capability.

The trusted execution environment acts as an intermediary between the de-identification process and information restoration. The TEE securely manages encryption keys and controls access to personal information, allowing privacy protection through de-identification while maintaining the ability to restore information under controlled conditions. The TEE mediates all access requests, ensuring both privacy and restoration capability are preserved.

The patent applies segmentation by dividing the centralized system into multiple trusted execution environments, each with isolated secure storage areas. Personal information is segmented into encrypted data blocks stored in separate TEE instances. This segmentation maintains processing efficiency through coordinated TEE operations while reducing unauthorized access risk, as compromising one TEE does not expose the entire dataset.

The trusted execution environment creates an inert, secure atmosphere for storing and processing personal information. The TEE provides a hardware-isolated, tamper-resistant environment that protects data from unauthorized access and manipulation. This secure environment allows efficient data processing while fundamentally reducing the risk of leakage and unauthorized access, as the TEE's hardware boundaries prevent external intrusion.

The patent applies merging by combining key generation, storage, and management functions within the trusted execution environment. The TEE integrates these previously separate functions into a unified secure module, improving access control while reducing key management complexity. The TEE's hardware-based security mechanisms automatically handle key lifecycle management, eliminating the need for complex external key management systems.

The trusted execution environment provides self-service for encryption key management. The TEE automatically generates, stores, protects, and manages encryption keys without requiring external intervention or complex administrative procedures. This self-service capability improves access control reliability while significantly reducing key management complexity, as the TEE handles all key operations autonomously within its secure boundaries.