Biometric authentication is a security process that relies on the unique biological characteristics of individuals to verify they are who they say they are.
Biometric authentication systems compare physical or behavioral traits to stored, confirmed, authentic data in a database..
Select Settings and then Security.
Turn on Biometric unlock.
Scan your fingerprint..
Biometric login provides a convenient method for authorizing access to private content within your app.
Instead of having to remember an account username and password every time they open your app, users can just use their biometric credentials to confirm their presence and authorize access to the private content..
The Android Mobile Device
However, to perform sophisticated biometric registration and to identify someone's identity from your database, you will need a particular android phone with a high-quality biometric scanner that can save biometric data according to the requirement of your matching engine..
In October 2022, Microsoft announced that Xamarin and Xamarin.
Forms apps will no longer be supported after May 1, 2024, which is just eight months from the writing of this post.
The reason for this deadline is that Xamarin is being replaced by its successor technology, .
NET MAUI..
The key requirement in Android is that fingerprint biometrics have to be stored in the Trusted Execution Environment (TEE).
This means that the biometric information is encrypted and stored in a separate part of the smartphone, completely inaccessible to the regular operating system.
They can't even be exported..
Most mobile apps implement autentication to secure data access, and most of them now offer the so-called biometric authentication, which allows for authenticating the user via the fingerprint sensor and the face ID on those devices that have these capabilities.
In terms of Xamarin, this should be done with native code for each platform.
In terms of Xamarin, this should be done with native code for each platform.
However, a few plugins makes it easier to implement biometric authentication using cross-platform code.
You can use Visual Studio for that.
Right-click on the Android project and then click on Properties.
Then, click on Android Manifest tab and in the section Required permissions check the properties USE_FINGERPRINT.
Then, open your MainActivity.cs and after Xamarin.Forms initialization add the following code:.
Biometric authentication is highly demanded on mobile apps, but you might need additional logic.
For example, you might want to ensure your user has the option to also login using a password.
This will be a life-saver for example in case the biometric hardware is not working properly.
