Consider combining Shamir Secret Sharing + Passphrase: - Shamir Secret Sharing: Split the mnemonic into N parts, requiring M parts to restore it (e.g., 3-of-5). - Passphrase: After restoring the mnemonic, you still need a password in your mind to derive the real wallet address. Layer 1: Collect enough shares → Restore the mnemonic Layer 2: Know the passphrase → Access the real wallet - Find 1-2 shares → Can't restore the mnemonic → Completely useless - Even if all shares are found and restored → Without the passphrase → Only see the decoy wallet - Double protection, extremely secure This combo offers top-tier security, but the "risk of loss" increases as well. For most people, using just a passphrase is already sufficient to handle search scenarios. Adding Shamir Secret Sharing trades "potential permanent asset loss" for "higher anti-search capability." If you really want to use this combo, it's recommended to go with 2-of-3 instead of 3-of-5 to reduce the risk of losing shares.