Yes, allow the users to create multiple accounts and also allow them to encrypt and hide those other accounts. This should also be available to fingerprint rea

Yes, allow the users to create multiple accounts and also allow them to encrypt and hide those other accounts. This should also be available to fingerprint readers, as the suggest "gesture" would be even easier: just use a different fingerprint (you can set the fingerprint that everyone expects you to use as the "other fingerprint", and use some other fingerprint as your default one). It should also work with passwords, etc.