1*4d7e907cSAndroid Build Coastguard Worker## Biometric HALs ## 2*4d7e907cSAndroid Build Coastguard Worker--- 3*4d7e907cSAndroid Build Coastguard Worker 4*4d7e907cSAndroid Build Coastguard Worker## Overview: ## 5*4d7e907cSAndroid Build Coastguard Worker 6*4d7e907cSAndroid Build Coastguard WorkerThe interfaces within the biometrics.* HAL tree are used by the Android Biometric Services 7*4d7e907cSAndroid Build Coastguard Worker(e.g. FingerprintService, FaceService) to discover and operate biometric sensors on the device. 8*4d7e907cSAndroid Build Coastguard Worker 9*4d7e907cSAndroid Build Coastguard WorkerMore details and versioning information can be found within each particular HAL. 10*4d7e907cSAndroid Build Coastguard Worker 11*4d7e907cSAndroid Build Coastguard WorkerMore complete information about the Android Biometric HALs and subsystem can be found at 12*4d7e907cSAndroid Build Coastguard Worker[source.android.com](https://source.android.com/security/biometric).