Bip39 Standard. Is passphrase similar to PIN? No, a passphrase just isn't similar to a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of security for your wallet that actually works along with your seed phrase to encrypt and defend your wallet. A PIN, on https://bookmarkunit.com/story18903271/bip39-https-linktr-ee-bip39-the-best-side-of-bip39-mnemonic