Bip39 vs bip32 https://blogfreely.net/travenmdoq/create-your-own-distinct-bip39-mnemonic-expression-with-python-scripts BIP85: A more recent proposal enabling the deterministic derivation of multiple BIP39 mnemonic seeds from a learn seed. Thanks to the cryptographic style of BIP-39, a weak passphrase does not reduce the protection of the other wallets or assist reveal the seed words.... http://www.mediafire.com/file/uilrjfajg2ami24/pdf-14673-57158.pdf