> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/faq.md).

# FAQ

***

## **1. What is the CAF SmartAuth SDK and what is its main functionality?**

**Answer:**

The CAF SmartAuth SDK provides a customizable solution for user authentication through various methods, including live facial verification, SMS, and email. It’s ideal for enhancing security in applications requiring user authentication, particularly for scenarios like user onboarding, secure access, and identity verification.

***

## **2. What are the system requirements for the CAF SmartAuth SDK on Android?**

**Answer:**

The SDK is compatible with Android API 26 and above, supporting a wide range of modern Android devices. Ensure your Android project has a **minimum SDK version of 26**.

For further requirements, including specific versions of Kotlin and Gradle, refer to the [Requirements section](/caf-sdk/android/standalone-modules/cafsmartauth/requirements.md).

***

## **3. What permissions are required to use the SDK?**

**Answer:**

The SDK requires the following permissions:

* Camera (`android.permission.CAMERA`) for facial verification.
* Internet (`android.permission.INTERNET`) for remote verification and communication.
* Fine Location (`android.permission.ACCESS_FINE_LOCATION`)
* Course Location (`android.permission.ACCESS_COARSE_LOCATION`)

Add these permissions to your `AndroidManifest.xml`, and handle runtime permission requests as necessary for Android versions that require them. Guide to handle location runtime permissions [here](/caf-sdk/android/standalone-modules/cafsmartauth/permissions.md).

***

## **4. How do I integrate the CAF SmartAuth SDK into my Android project?**

**Answer:**

To integrate the SDK:

1. Include the SDK dependencies in your `build.gradle` file.
2. Configure the necessary permissions for camera and internet in your `AndroidManifest.xml`.
3. Initialize the SDK in your application’s lifecycle, typically in the `onCreate()` method of your main activity.

Refer to the [Gradle setup section](/caf-sdk/android/standalone-modules/cafsmartauth/gradle.md) for step-by-step integration details.

***

## **5. What is the current version of the SDK, and where can I find version-specific details?**

**Answer:**

The SDK version is periodically updated. For the latest version information, release notes, and changelogs, check [here](/caf-sdk/ios/standalone-modules/cafsmartauth/current-version.md).

***

## **6. How do I start the authentication process using the SDK?**

**Answer:**

To initiate the authentication process:

1. Configure a SmartAuth session with the desired authentication policies (e.g., face verification, SMS, email).
2. Start the session using the SDK’s builder.
3. Capture and handle the results in your activity callback.

For more details, see the [Authentication Setup section](/caf-sdk/android/standalone-modules/cafsmartauth/start-sdk.md).


---

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