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Now you can use Android devices as security keys for iPhones, iPads

Google looks to add an extra layer for security for Apple's devices.

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Android devices versions 7.0 and up can be used to verify logins on iOS devices, Google announced on Wednesday.

Lynn La/CNET

You can start using an Android phone as a security key for your iOS devices, Google announced on Wednesday. The expansion comes nearly two months after Google first unveiled the security feature for more than a billion Android devices.

Security keys are one of the best ways you can protect your accounts from hackers, but convenience and adoption has always been a major roadblock. Google hoped to tackle that by allowing Android devices versions 7.0 and up to function as security keys. Despite that feature being available to half of all Android users, only about 100,000 people accessed it in its first month, a Google spokesperson said.

It's not different from two-factor authentication for Gmail, which only about 10 percent of people actually use.

Security keys have obvious benefits: Even if a hacker steals your password and login, unless he or she also stole the physical key, your account would still be safe. Also, if you were typing in your credentials on a phishing website, the security key would detect it and warn you about the fraudulent page.

When Google first announced Android phones as security keys, it noted that it was only working on Chrome browsers and Google accounts, but it expected to expand availability. It already works over MacOS by using the Chrome browser, but for iOS devices, Google will require people to use the Smart Lock app instead.

Your Android device and the iOS device you're trying to log in on communicate through Bluetooth with the FIDO authentication standard.

The expansion for Android phones as security keys adds another layer of security for iOS devices, as Apple also announced privacy protections with logins at WWDC. Sign-In with Apple allows people to log onto other services without providing their email addresses and passwords, and works with biometrics like Face ID and Touch ID instead.

Like security keys, biometrics offer an extra level of protection, as it's much harder for hackers to remotely steal your fingerprints or your face. 

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