Bip39 Vs Slip39. Is passphrase similar to PIN? No, a passphrase is just not the same as a PIN. A passphrase, inside 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 safeguard your wallet. https://one-bookmark.com/story18595106/bip39-passphrase-https-linktr-ee-bip39-the-fact-about-bip39-wallets-that-no-one-is-suggesting