Saturday , October 24 2020

Lock down your account without carrying around an extra device.

How to use your iPhone as an encrypted Google security key


Staff Writer,

Macworld |

Android users have been able to use their phones as Google security key for a while now, and now Google is finally making good on the promise to bring the same functionality to the iPhone. An update to the Google Smart Lock app this week turns your iPhone into an honest-to-goodness FIDO2 key, using the Secure Enclave to skip SMS and keep your accounts safe.

It only works with Google accounts so far, but it’s a great tool for security-minded users. Instead of relying on one-time passwords delivered over SMS, you’ll be able to use your iPhone to log into your account on another PC, Mac, or iOS device quickly and securely without spending money on a separate hardware key. This method doesn’t work on Android phones and any browser activity will need to be done using Chrome. Any iPhone with a Secure Enclave will work, which is any phone after the iPhone 5S. (It’s unclear if the iPhone 5S supports the feature, as it packs a Secure Enclave but doesn’t support iOS 13.)

Setting up your iPhone as a security key takes just a few taps.

Obviously, you’ll need to have two-factor authentication (2-Step Verification here) turned on for your Google Account to take advantage of the extra layer of security, so if you don’t, go do it now. Once that’s set up, here’s how it works:

And that’s all you need to do. Now when you sign into a Google service on a new device, you’ll be able to use your iPhone to authenticate your account.

Once you go through the set-up process, your iPhone will appear alongside any security keys you have linked to account.

As long as they’re within Bluetooth range (and Bluetooth is turned on for both accounts), you’ll get a prompt on your iPhone when signing into a Google account on a new device, and you’ll be able to quickly verify that it’s you without the fear of someone stealing your texts. And if you forget your iPhone, you’ll still be able to select SMS as an option or use an Authenticator app by choosing “Sign in another way.”

This story, “How to use your iPhone as an encrypted Google security key” was originally published by


Michael Simon covers all things mobile for PCWorld and Macworld. You can usually find him with his nose buried in a screen. The best way to yell at him is on Twitter.

Copyright © 2020 IDG Communications, Inc.

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