Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase is just not similar to a PIN. A passphrase, in the context of Bitcoin wallets, is an additional layer of safety towards your wallet that actually works along with your seed phrase to encrypt and safeguard your wallet. A https://madesocials.com/story4124602/bip39-wallet-https-linktr-ee-bip39-a-secret-weapon-for-bip39-mnemonic