How to sign in with a security key on your computer or phone

TL;DR — A security key is a small device or built-in phone/computer feature that confirms it is really you during sign-in. In most cases, the fastest fix is to use a supported browser, click Use a security key, insert or tap the key when prompted, and touch the key’s sensor; if that fails, turn on Bluetooth for phone-based keys or try a different USB port. Reading time: ~5 min

Goal

When you finish, you will be signed in to your account using a security key, and you will know how to repeat the sign-in on the same computer or on a phone without trial and error.

Prerequisites

• Your account username or email address.
• Your security key, one of these types:
  • USB security key
  • NFC security key (near-field communication, a short-range wireless tap)
  • Phone or computer acting as a passkey/security key if your sign-in page offers that option
• A supported browser:
  • Google Chrome, current version
  • Microsoft Edge, current version
  • Safari, current version on macOS or iPhone/iPad
  • Firefox, current version (some sites support it; if your prompt looks different, try Chrome or Edge first)
• If you are using a phone as the key, have these ready:
  • Bluetooth turned on on both devices
  • The phone unlocked and nearby
  • Internet access on both devices
• If your company requires two-step sign-in, have your backup method available in case the key is not recognized:
  • Authenticator app code
  • Backup code
  • Another registered security key

Steps

Step 1: Open the sign-in page in a supported browser

Use your normal sign-in URL, then enter your email or username and password if asked.

Exact menu path:

• Browser → open your account sign-in page
• Enter your email or username
• Enter your password
• Click Sign in or Next

What you should see when this succeeds: a prompt that says Use your security key, Insert your security key, Touch your security key, or Use a passkey.

Step 2: Choose the security key option

If the page offers more than one sign-in method, select the security key option explicitly.

Exact on-screen choices to look for:

• Use a security key
• Try another way → Security key
• Use a passkey
• Use phone, tablet, or security key

What you should see when this succeeds: a browser pop-up asking to use a security key or a device-selection window.

Step 3: Use the right action for your key type

Follow the exact action for the type of key you have.

For a USB key:

• Insert the key into a USB port.
• If the browser asks, click Continue or OK.
• Touch the metal pad or button on the key once.

For an NFC key:

• Click Continue on the browser prompt.
• Hold the key against the back or top edge of your phone where NFC usually reads.
• Keep it there for 1-2 seconds.

For a phone acting as the key:

• In the browser prompt, choose your phone if it appears.
• Turn on Bluetooth on both devices if asked.
• Unlock the phone.
• Approve the sign-in on the phone screen.

What you should see when this succeeds: the browser prompt closes and you are redirected into your account.

Step 4: If prompted, enter the key PIN or use biometrics

Some security keys ask for a PIN (a short code stored on the key) or for a fingerprint/face check on your device.

Exact on-screen actions:

• Enter the PIN for the security key in the browser prompt, then click OK or Continue.
• Or complete Touch ID, Windows Hello, Face ID, or your device fingerprint prompt.

What you should see when this succeeds: the prompt disappears and the sign-in continues automatically.

Step 5: Complete any account confirmation screen

Some services show a final confirmation page after the key is accepted.

Exact on-screen actions:

• Click Continue
• Or click Yes, it’s me
• Or click Done

What you should see when this succeeds: your account home page, dashboard, inbox, or app landing page loads.

Step 6: If the key is not detected, retry in the safest order

Do these retries in order; they fix most sign-in failures without changing account settings.

Exact actions:

1. Remove the key and insert it again.
2. Try a different USB port.
3. Close the browser tab, reopen the sign-in page, and repeat Steps 1-5.
4. If you are using a phone as the key, turn Bluetooth off and back on for both devices, then retry.
5. If you are in Firefox, retry in Chrome, Edge, or Safari.
6. If your account offers Try another way, use your backup method to get signed in, then register a second key later.

What you should see when this succeeds: the browser recognizes the key and shows the normal approval prompt.

Verify it works

Use these checks to confirm the sign-in completed with the key and not with a fallback method.

• You land on your account page without being asked for an SMS code or email code.
• Your recent security activity page, if your service provides one, shows a successful sign-in from your current device.
• If you sign out and repeat the process, the security key prompt appears again and completes successfully.

Exact menu path to test the full flow:

• Account menu → Sign out
• Open the sign-in page again
• Repeat Use a security key

What you should see when this succeeds: you can sign out and back in again with the same key, and the sign-in completes in one browser flow.

[Sign-in Page] ---- 1. enter username/password ----> [Browser Prompt]
[Browser Prompt] ---- 2. use security key ----> [Key or Phone]
[Key or Phone] ---- 3. approve/touch/PIN ----> [Browser Prompt]
[Browser Prompt] ---- 4. success ----> [Your Account]

Common pitfalls

You did not touch the key after inserting it

Mistake: inserting the USB key and waiting without touching the sensor/button.

Symptom: the browser keeps showing Insert your security key or times out after several seconds.

Fix: touch the metal pad or button on the key once after the browser prompt appears.

Bluetooth is off when using a phone as the key

Mistake: trying to use a nearby phone for approval with Bluetooth disabled on the computer or phone.

Symptom: the phone never appears in the device list, or the browser says it cannot find a nearby device.

Fix: turn on Bluetooth on both devices, keep the phone unlocked and nearby, then retry the sign-in.

The browser does not fully support the site’s security key flow

Mistake: using an older browser or one the site does not handle well for this prompt.

Symptom: no security key prompt appears, the pop-up closes immediately, or the page loops back to sign-in.

Fix: retry in the latest Chrome, Edge, or Safari.

You are using the wrong key

Mistake: using a key that was never registered to this account.

Symptom: the key is detected, but the site says That key isn’t recognized or returns to Try another way.

Fix: use another registered key or your backup sign-in method, then add the correct key from your account security settings after you sign in.

The key PIN is entered incorrectly too many times

Mistake: guessing the PIN stored on the key.

Symptom: the browser says the PIN is incorrect, or the key becomes temporarily unavailable.

Fix: stop retrying and use a backup sign-in method; if needed, contact your internal administrator or the key vendor’s instructions for PIN reset, because some keys erase credentials on reset.

NFC tap position is wrong on the phone

Mistake: tapping the NFC key against the wrong part of the phone.

Symptom: nothing happens when the key touches the phone.

Fix: move the key slowly along the back top area of the phone and hold it in place for 1-2 seconds after the browser prompt appears.

This article was written by an AI system and published pending human review. Verify anything you intend to act on.