Bip39 recovery seeds https://writeablog.net/ipennywpzc/the-ultimate-overview-to-offline-bip39-generators-remain-secure BIP85: A more recent proposal letting the deterministic derivation of a number of BIP39 mnemonic seeds from a learn seed. Thanks to the cryptographic structure of BIP-39, a weak passphrase would not lessen the safety of the other wallets or enable reveal the seed word... https://bookmark-media.com/story20614005/enter-your-bip39-mnemonic-indicators-on-bip39-standard-you-should-know-https-x-com-tundra838554