Bip39 Checksum. At first you'll want to retail outlet it Independently from the seed. Getting your seed along with your passphrase in exactly the same location defeats the goal of using a passphrase to begin with. With out a passphrase, your money are only as protected as your seed phrase. https://bookmarklayer.com/story19403863/ian-coleman-bip39-https-linktr-ee-bip39-not-known-factual-statements-about-ian-coleman-bip39