Bip39 Checksum. A mnemonic phrase, mnemonic recovery phrase or bitcoin seed is often a list of words which retail store all the data needed to recover a bitcoin wallet. A wallet will normally make a mnemonic backup phrase and instruct the user to write down it down on paper. Indeed, https://socialbuzzfeed.com/story4392001/bip39-passphrase-https-linktr-ee-bip39-getting-my-ian-coleman-bip39-to-work