Bip39 Checksum. You would then do a simple recovery which has a command similar to the a single under. (This command makes use of a sample wallet file bunlded with BTCRecover) They don't retail outlet specifically personalized data, but are based upon uniquely determining your browser and Net system. If https://getsocialnetwork.com/story4326056/bip39-wallets-https-linktr-ee-bip39-top-guidelines-of-bip39-passphrase