Bip39 Checksum. At the start you ought to retail store it SEPARATELY out of your seed. Acquiring your seed and also your passphrase in precisely the same locale defeats the purpose of getting a passphrase to start with. Entropy is a complicated function. Your mnemonic might be insecure if this https://social-lyft.com/story8514412/bip39-generator-https-linktr-ee-bip39-getting-my-ian-coleman-bip39-to-work