> For the complete documentation index, see [llms.txt](https://docs.vida.id/identity-stack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vida.id/identity-stack/authentication/introduction/faq.md).

# FAQ

## **Product FAQs**

#### **1. What is VIDA Authentication Services?**

VIDA Authentication Services is a biometric and device-based authentication platform that prevents unauthorized access and fraud using **PKI-backed device security and advanced biometrics**.

#### **2. What authentication solutions does VIDA offer?**

VIDA provides:

* **VIDA Phone Token** – Device-based authentication using **Public Key Infrastructure (PKI)**.
* **VIDA Face Token** – Multi-factor authentication combining **Phone Token, Selfie ID, and Liveness Detection**.
* **VIDA Face Match** – Biometric facial recognition to verify a user’s identity.

#### **3. How does VIDA prevent fraud?**

VIDA stops fraud using:

* **PKI-based device authentication** to block unauthorised access.
* **Biometric face matching** to prevent identity theft.
* **Liveness detection** to detect spoofing attempts.

#### **4. Does VIDA Authentication support multi-factor authentication (MFA)?**

Yes, VIDA supports **MFA** by combining:

* **Something you know** (PIN, password).
* **Something you have** (Phone Token).
* **Something you are** (Face Token).

#### **5. What are the key benefits of using VIDA Authentication?**

* **Tamper-proof security** – Ensures only trusted devices and users can authenticate.
* **Frictionless user experience** – Quick authentication with face biometrics and device binding.
* **Regulatory compliance** – Meets global security and identity verification standards.
* **Seamless integration** – Available via **APIs** and **SDKs** for easy implementation.

## **Integration FAQs**

#### **1. What integration methods does VIDA support?**

VIDA offers flexible integration via:

* **RESTful APIs** – Standard HTTP methods with JSON responses.
* **SDKs** – Available for Android, iOS applications. VIDA also supports React Native SDKs for Phone Token

#### **2. How does VIDA Phone Token work?**

VIDA Phone Token securely binds a **unique private key** to a device using **PKI**, ensuring that only trusted devices can authenticate transactions.

#### **3. How can developers integrate VIDA Authentication into their apps?**

Developers can:

* Use **VIDA Authentication APIs** for backend authentication.
* Embed **VIDA SDKs** into mobile applications for seamless biometric authentication.

#### **4. What environments are available for testing and deployment?**

VIDA provides:

* **Sandbox Environment** – For development and testing.
* **Production Environment** – For live authentication.

#### **5. How do I get API credentials for integration?**

To access VIDA’s authentication API, request **client ID and secret** by contacting the VIDA support team.

#### **6. What security measures does VIDA implement for API and SDK integration?**

VIDA ensures security through:

* **End-to-end encryption** for all API requests.
* **PKI-based device authentication** for secure transactions.
* **Biometric verification** to prevent unauthorized access.