Bip39 php https://www.sbnation.com/users/typhanhmdy A BIP39 seed phrase created with appropriate randomness can't be guessed by brute power, simply because you'll find just too quite a few permutations. BitBox02 - A successor for the BitBox sequence, this hardware wallet supports BIP39 seed phrases and offers a mixture of usability and stability. https://penzu.com/p/2ea6922b70254307