Bip39 Standard. Is passphrase similar to PIN? No, a passphrase is just not the same as a PIN. A passphrase, from the context of Bitcoin wallets, is an extra layer of safety to your wallet that actually works together with your seed phrase to encrypt and defend your wallet. A https://socialbuzzmaster.com/story4194797/bip39-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy