Bip39 Github. The passphrase will not be chosen with the predefined list of 2048 words – it could be any word or phrase you choose. At its core, a BIP39 passphrase modifies the cryptographic technique of wallet era. In this article’s a technical take a look at how it works: https://socialimarketing.com/story4460619/bip39-wallets-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy