Bip39 Seed Generator. Is passphrase similar to PIN? No, a passphrase is just not similar to a PIN. A passphrase, while in the context of Bitcoin wallets, is an additional layer of security on your wallet that works together with your seed phrase to encrypt and shield your wallet. A https://socialbuzzfeed.com/story4326869/bip39-mnemonic-https-linktr-ee-bip39-about-ian-coleman-bip39