---
title: "Authenticate with a Security Key"
canonical: "https://tech.calpoly.edu/space/CPKB/1182957900/Authenticate%20with%20a%20Security%20Key"
format: markdown
---
A security key plugs into your USB port and when tapped or pressed it sends a signed response back to Duo to verify your login. 

> ℹ️ To use a security key with Duo, make sure you have the following:
> ℹ️ 
> ℹ️ - A supported browser. (see [table on Duo guide](https://guide.duo.com/universal-prompt#webauthn-supported-browsers) to check)
> ℹ️ - An available USB port on you device.

### Get a Security Key

Purchase a security key, like [Yubico’s YubiKey](https://www.yubico.com/why-yubico/for-individuals/), or any OATH HOTP-compatible tokens. 

#### First Time Set Up - From Cal Poly Portal

<details>
<summary>Click to see first time set up instructions</summary>

Enroll your security key. 

1. Log in to the [My Cal Poly](https://myportal.calpoly.edu/) portal.
2. Go to the **Personal Info tab **> **Personal Info **portlet > **Authorized Devices** > **Multi-factor Authentication** >** Edit**.
  
3. You will be prompted to authenticate with Duo with your current device.
4. Once authenticated, click **Add a device**
  
5. Select the **Security Key** option and then click the **Continue** button.
  
  
6. Follow the on-screen prompt to complete the enrollment.  
*Your security key is now added to your Duo account.*
</details>

#### Use a Security Key

<details>
<summary>Click to learn how to use a Security Key</summary>

1. Log in to the [My Cal Poly](https://myportal.calpoly.edu/) portal or Cal Poly MFA/Duo-enabled application.
2. Insert your **security key** if not already plugged in, and then **tap or press your security key** when prompted to log in to the application.   
*Once your identity is verified, your Cal Poly account will be authenticated.*

> 📝 **KEEP IN MIND**
> 📝 
> 📝 - *Some types of keys flash as a prompt for you to authenticate. *
> 📝 - *Your browser may also pop up a prompt instructing you to tap your security key.*
> 📝 - *You need to interact with the prompt to use a security key from Safari browser on macOS or any browser on iOS.*
</details>

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