1# Before You Start 2 3 4Before you get started, learn the development process. 5 6 7- [Obtain the user authentication capabilities supported by the device.](obtain-supported-authentication-capabilities.md) 8 9- [Initiate a request for user authentication and obtain the authentication result.](start-authentication.md) 10 11- Verify and use the authentication result. For details, see [Key Access Control via Secondary Authentication](../UniversalKeystoreKit/huks-identity-authentication-overview.md). 12 13- (Optional) [Cancel authentication.](cancel-authentication.md) 14 15- (Optional) [Apply custom authentication.](apply-custom-authentication.md) 16 17 18## Requesting Permissions 19 20The application capable of user authentication based on biometric features (such as facial and fingerprints) must have the ohos.permission.ACCESS_BIOMETRIC permission. 21 22This permission is a system_grant (system authorization) permission. You can declare it in the **requestPermissions** tag in the **module.json5** file. For details, see [Declaring Permissions](../AccessToken/declare-permissions.md). 23 24<!--no_check--> 25 26