Bip39 release date https://www.sbnation.com/users/typhanhmdy BIP85: A newer proposal letting the deterministic derivation of many BIP39 mnemonic seeds from the learn seed. How much safety does a passphrase add? A BIP39 passphrase substantially enhances your Bitcoin wallet’s protection. It acts as an additional, customizable layer in addition to your seed phrase. https://collinmmss433.lucialpiazzale.com/from-concept-to-fact-generating-bitcoin-addresses-with-bip39