Doubts about the fingerprint

[rdvg...@gmail.com]

I have to make an app that, depending on the option that the user takes, must first be validated by the fingerprint reader in order to continue.

Users can use the cell phone for several months and then be replaced by other users, it is for that reason that I thought that my app should allow to create or update the fingerprint according to the need.

Download the example program and do tests on a Samsung A50 and for the example to work I first had to create the footprint in the configuration options.

In the example it is allowed to enter a key and its value.

I'm sure I'm not understanding how it works and I have the following doubts:

Is there a way to create the fingerprint without having it previously created in the cell phone settings?

What is the key for me if I can add, take or delete an item without it?

Although the device supports the fingerprint reader, I don't see a way for an app to detect it if there is not a configured fingerprint first. This can be misleading.

I appreciate your comments.

[Shai Almog]

As far as I recall the device needs to already have your fingerprint scanned and authenticated. So if the device is passed to someone else he'll need to go into settings and update the list of fingerprints. If your OK with any user as long as he's authenticated you can just approve everyone who has a fingerprint on the device. Since the device is already secured by password/fingerprint this should work.

[rdvg...@gmail.com]

Hi,

Thanks for answering.

What you comment makes a lot of logic. One of the things I try is to ensure that there are no security leaks. A user could pass the cell phone to another person and register their fingerprint (up to 4 are allowed) and use the app without problem. That's why it seems important to me that the footprint can be created and managed from the app.

[rdvg...@gmail.com]

Hi,

Sorry, I was quick to draw conclusions, apparently the success of its use is through the key.

[Shai Almog]

Hi,
As far as I know biometrics aren't editable or added via apps. But I'm not an expert in this field.