Bip39 Mnemonic. The password could be created down along with the mnemonic phrase, but It might be more practical to remember it, so that a very two-variable Restoration method could be accomplished: for unblocking Bitcoins, you'll need “what you've” moreover “what you know”. Working with passphrases increases stability and flexibility. https://socialinplace.com/story4806870/bip39-passphrase-https-linktr-ee-bip39-5-simple-statements-about-bip39-mnemonic-explained