Bip39 Standard. Is passphrase similar to PIN? No, a passphrase is not really similar to a PIN. A passphrase, inside the context of Bitcoin wallets, is an extra layer of safety to the wallet that actually works together with your seed phrase to encrypt and safeguard your wallet. A PIN, https://thejillist.com/story8914288/bip39-list-https-linktr-ee-bip39-a-review-of-bip39-generator