Bip39 Passphrase. Then in the theft or threatening circumstance, you may give your attackers the recovery seed phrase (without the passphrase) and they could Get well the wallet with no being aware of you've got another wallet using a passphrase BIP32 was the main seed standard for hierarchical deterministic wallets. https://card-directory.com/listings601495/bip39-wallet-https-linktr-ee-bip39-top-bip39-seed-phrase-secrets