Bip39 Checksum. Before everything you must keep it Independently from your seed. Owning your seed plus your passphrase in a similar area defeats the objective of possessing a passphrase in the first place. Mnemonics are representation of entropy. Starting point will involve generating a decision regarding simply how much entropy https://expressbookmark.com/story19017785/bip39-passphrase-https-linktr-ee-bip39-helping-the-others-realize-the-advantages-of-bip39