# AuthenticationRequest.Biometric.Strength

Artifact: [androidx.biometric:biometric](https://developer.android.com/jetpack/androidx/releases/biometric) [View Source](https://cs.android.com/search?q=file:androidx/biometric/AuthenticationRequest.kt+class:androidx.biometric.AuthenticationRequest.Biometric.Strength) Added in [1.4.0-beta01](https://developer.android.com/jetpack/androidx/releases/biometric#1.4.0-beta01)

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```
abstract class AuthenticationRequest.Biometric.Strength
```

<br />

Known direct subclasses [AuthenticationRequest.Biometric.Strength.Class2](https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength.Class2), [AuthenticationRequest.Biometric.Strength.Class3](https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength.Class3)

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| `https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength.Class2` | Class 2 (formerly Weak). |
| `https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength.Class3` | Class 3 (formerly Strong). |

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Types of biometric strength for the prompt.

## Summary

| ### Nested types |
|---|
| `object https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength.Class2 : https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength` Class 2 (formerly Weak). |
| `class https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength.Class3 : https://developer.android.com/reference/kotlin/androidx/biometric/AuthenticationRequest.Biometric.Strength` Class 3 (formerly Strong). |