Bip39 Npm. The passphrase is just not picked through the predefined list of 2048 words – it may be any word or phrase you end up picking. At its Main, a BIP39 passphrase modifies the cryptographic technique of wallet technology. Here’s a technological check out how it really works: BIP-32 https://socialeweb.com/story4926258/bip39-passphrase-https-linktr-ee-bip39-a-review-of-bip39-word-list-pdf