Bip 39 github http://www.video-bookmark.com/user/tucanewhmt BIP85: A more recent proposal letting the deterministic derivation of several BIP39 mnemonic seeds from the grasp seed. Because of the cryptographic style and design of BIP-39, a weak passphrase isn't going to reduce the protection of one other wallets or aid reveal the seed words. https://www.4shared.com/s/fAf7kF4dLku