> 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/use-cases/proof-of-presence-medium-risk-authentication.md).

# Proof of Presence (Medium-Risk Authentication)

Proof of Presence combines the VIDA Phone Token with Device Biometrics, such as fingerprint or facial recognition, to confirm both the device and the user’s physical presence. This method is designed for medium-risk scenarios that require stronger authentication than device verification alone. It adds an additional layer of security while maintaining a user-friendly experience.

## **Key Features:**

* Combines PKI device authentication and biometrics for enhanced security.
* Ensures the user's presence while keeping the interaction seamless.
* Reduces fraud risks associated with stolen or lost devices.

## **Use Cases of Proof of Presence:**

Proof of Presence is suited for tasks where verifying both the device and user presence is critical:

### **Use Case 1: Log Into Your Account**

Allow users to securely log into their accounts while ensuring that the person accessing the account is physically present.

**Challenge**:

* Traditional login methods, like username and password, are highly vulnerable to phishing attacks, credential stuffing, and brute-force attempts.
* Users expect both security and convenience when accessing their accounts, especially on personal devices.

<figure><img src="/files/wdMK7F4kNY517C1HZPSL" alt=""><figcaption><p>Account Login - Befor and After VIDA Secured Flow</p></figcaption></figure>

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### **Use Case 2: Viewing Sensitive Account Details**

Allow users to securely view personal information, such as phone numbers, or saved credit card details, while ensuring only authorized account holders can make these changes.

**Challenge**:

* Viewing sensitive account information are medium-risk actions often targeted by attackers to gain access to critical information.
* Traditional methods, like password-based authentication, are inadequate to prevent unauthorized changes.

<figure><img src="/files/6Dz6WYkM6q8e7HmDbv8r" alt=""><figcaption><p>Viewing Sensitive Account Details - Before and After VIDA Secure Flow</p></figcaption></figure>

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Solution with VIDA Proof of Presence:

* **Enhanced Authentication**: Combines VIDA Phone Token with device biometrics (e.g., fingerprint or facial recognition) to confirm both the device and the user’s physical presence before getting access to sensitive information.
* **Frictionless Experience**: Integrates seamlessly into the flow, providing an intuitive and secure process.