Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase isn't similar to a PIN. A passphrase, within the context of Bitcoin wallets, is an additional layer of safety to your wallet that actually works along with your seed phrase to encrypt and secure your wallet. A PIN, On https://socialinplace.com/story4151920/bip39-wallet-https-linktr-ee-bip39-a-review-of-bip39-word-list-pdf