## **Appendix: Glossary**

| Term | Common Definition | Role in This Protocol |
| :--- | :--- | :--- |
| **TEE (Trusted Execution Environment)** | An "independent safe deposit box" in the phone's chip. | Stores the master key $K$, preventing key theft even if the phone is compromised. |
| **SSS (Secret Sharing Scheme)** | Like the ancient "tiger's order," torn into fragments separately, assembled into authority. | Fragments the master key into $S_0, S_1, S_2$, enabling disaster recovery and backup. |
| **Mnemonic** | The system's "meta-seed," the most important words in life. | The highest permission root for recovering all assets. |
| **Privacy Proxy** | Your "digital double," speaking to AI on your behalf. | Intercepts local sensitive information, removes IP/device ID, preventing identity leakage. |
| **Arweave** | A "permanent and unchangeable" digital monument. | Permanently custodies encrypted ciphertext, solving the problem of data loss after traditional cloud storage bankruptcy. |
| **Recursive Sharding** | Like feeding shredded paper through the shredder one more time. | Ensures that even if storage nodes are compromised, attackers cannot obtain the complete cloud shard $S_1$. |
| **Dead Man Switch** | If I stop checking in, the protocol executes automatically. | Monitors commercial entity status; if bankrupt, transfers decryption rights to the community. |
| **Legal Trust** | A data "maintenance fund" protected by law. | Ensures storage fees remain continuously paid, preventing fee discontinuation due to company bankruptcy. |