ios - Is it possible to create some sort of hash/key from the user's fingerprint? -

i create app, uses hash or key touchid id or password, , put hash/key own database.

so if user log in app device, login credentials , fingerprint, still recognize them.

in short, apple doesn't provide access fingerprint data.

and can't used match against other fingerprint databases.

read more in an apple support article on touchid.

also see: is possible touchid information , compare fingerprint database?