Bip39-Standalone. Is passphrase similar to PIN? No, a passphrase will not be similar to a PIN. A passphrase, in the context of Bitcoin wallets, is an additional layer of stability to the wallet that actually works together with your seed phrase to encrypt and safeguard your wallet. A PIN, on https://socialtechnet.com/story4222701/bip-39-https-linktr-ee-bip39-what-does-ian-coleman-bip39-mean