Bip39 Passphrase. The passphrase is not really chosen with the predefined list of 2048 words – it might be any word or phrase you end up picking. BIP39 is really a structure implementation that lays out how copyright wallets make the set of words (or "mnemonic codes") that make up https://getsocialnetwork.com/story4612177/bip39-mnemonic-https-linktr-ee-bip39-not-known-facts-about-bip39