Bip39 Standard. At the start you ought to retailer it SEPARATELY from a seed. Getting your seed and your passphrase in the same locale defeats the goal of having a passphrase to start with. After you add a passphrase for your seed phrase, it entirely changes the derived non-public keys https://webcastlist.com/story20166617/bip39-words-https-linktr-ee-bip39-the-best-side-of-bip39