Bip39. The passphrase is not picked through the predefined list of 2048 words – it could be any word or phrase you choose. It is also discouraged to make words directly from assumed and utilize a safe cryptographic functionality to do so. Storing entropy (like retaining a deck of cards https://social4geek.com/story5101700/bip39-https-linktr-ee-bip39-the-single-best-strategy-to-use-for-bip39-wallets