Bip39 https://penzu.com/p/2ea6922b70254307 BIP85: A more recent proposal letting the deterministic derivation of various BIP39 mnemonic seeds from a master seed. Thanks to the cryptographic style of BIP-39, a weak passphrase won't reduce the safety of the opposite wallets or help expose the seed words. but it is not a passphrase https://bookmarkextent.com/story22123748/bip39-npmjs-5-tips-about-bip39-checksum-you-can-use-today-https-cutt-ly-uryc5rw7