Bip39 passphrase https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide BIP85: A newer proposal permitting the deterministic derivation of many BIP39 mnemonic seeds from a grasp seed. Due to the cryptographic design of BIP-39, a weak passphrase does not lessen the protection of one other wallets or help reveal the seed words. but it isn't a passphrase https://bookmarkingdelta.com/story20161157/bip39-backup-detailed-notes-on-bip39-wallet-https-t-me-bip39-chat