Bip39 Seed. Is passphrase similar to PIN? No, a passphrase just isn't the same as a PIN. A passphrase, during the context of Bitcoin wallets, is an extra layer of stability to the wallet that actually works together with your seed phrase to encrypt and shield your wallet. A PIN, https://sociallytraffic.com/story3553494/bip39-mnemonic-https-linktr-ee-bip39-an-unbiased-view-of-bip-39