I think this has been discussed previously on the forums, or somewhere else, just not sure where... I'll post it if I find it.

This is indeed a great idea, just like there are wallets that allow for fund spending after fingerprint identification, there could possibly be a way to make a "passphrase" of some sorts, composed of fingerprints.

However, at this point in time, it would probably be wiser to bet on retina scanning for this purpose. Or at least retina scanning for spending authorization: we probably don't have camera with enough definition to "take" more random "info" from our retinas than from our fingers.

Interested on opinions regarding retina scanning as an alternative for passphrases vs fingerprints...