Android Question Encrypt / Decrypt string with fingerprint authentication

[shinalon22]

Hello

Is there a way to decrypt a string with fingerprint authentication ?
I have an encrypted file that can be decrypted with a password. I want to encrypt the password and get back a decrypted string by using fingerprint authentication.
is it possible ?

 

[shinalon22]

let me rephrase the question :
Is it possible to decrypt a string/file with biometric authentication ?

 

[Erel]

You can authenticate the user with biometric features: Fingerprint Authentication
You don't get access to the key itself.

 

[shinalon22]

You don't get access to the key itself.

That's a little bit disterbing.
Is there a way to get to the key ? because most password manegers apps today gives you an option to get to the database with biometric authntication and if it is not possible to get to the key it means that they are saving the raw password somewere in the app database !!!

 

[Erel]

Technically it is possible to create a key that can only be used after authentication: https://developer.android.com/refer...uilder#setUserAuthenticationRequired(boolean)

As far as I remember, no one has exposed this feature in B4A.