> 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-device-low-risk-authentication.md).

# Proof of Device (Low-Risk Authentication)

Proof of Device ensures that all transactions and interactions originate from a trusted and verified device. By leveraging the VIDA Phone Token, a PKI-backed digital key, this method provides a strong yet lightweight authentication mechanism suitable for low-risk scenarios. This ensures the user’s device is the starting point of any transaction while keeping the process seamless for end-users.

## **Key Features:**

* PKI-based secure device authentication.
* Quick and frictionless user experience.
* Prevents unauthorized access from untrusted devices.

## **VIDA Proof of Device Use Cases:**

Proof of Device is ideal for low-risk actions where minimal user interaction is required:

### **Use Case 1 : Viewing Transaction History**:

Access transaction history with the assurance that it is the account holder initiating the request.

**Challenge**:

* Transaction history contains sensitive financial data that must be protected from unauthorized access.
* Inadequate authentication mechanisms leave this information vulnerable to account breaches and unauthorized viewing.

<figure><img src="https://2033469942-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FC2s0IISjZwzGfw8dm215%2Fuploads%2Fq9hvVBCA6xb3i4Xc5IHu%2FTransaction%20History.png?alt=media&amp;token=e0b3a557-9b56-4d2d-83a4-8d53c249cae2" alt=""><figcaption><p>Viewing Transaction History - Before and After Flow</p></figcaption></figure>

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### **Use Case 2 :** Viewing Loan Portfolio

Enable users to securely view their loan portfolio, including outstanding amounts, repayment schedules, and interest rates.

**Challenge**:

* Loan information is sensitive financial data that must be protected from unauthorized access.
* Unsecured systems are prone to exploitation by malicious actors attempting to access personal financial details.

<figure><img src="https://2033469942-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FC2s0IISjZwzGfw8dm215%2Fuploads%2FQLs4o9M5RSLpw6CmlZH3%2FLoan%20Portfolio.png?alt=media&amp;token=2adb2b86-ac72-4b23-b1a1-85242a457ca8" alt=""><figcaption><p>Viewing Loan Portfolio - Before and After Flow</p></figcaption></figure>

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Solution with VIDA Proof of Device:

* **Secure Device Validation**: Ensures that access to important details are initiated only from an authenticated trusted device.
* **User-Centric Experience**: Provides secure access without requiring cumbersome additional steps, maintaining usability.