Bip39. The password may be written down along with the mnemonic phrase, but it would be simpler to recollect it, to ensure that a extremely two-issue Restoration process may be accomplished: for unblocking Bitcoins, you may need “what you might have” furthermore “what you know”. Mnemonics are representation of entropy. https://travialist.com/story8818308/bip39-passphrase-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy