An anonymous reader quotes a report from 9to5Google: Phone by Google wants to combat the "growing threat of impersonation scams" and protect Android users against "sophisticated, AI-powered deepfake attacks" with fake call detection. [...] Fake call detection requires that both parties are on Android and use the Phone by Google app, while Google Messages and Google Contacts also have to be installed. When a contact calls, their phone "sends a silent confirmation signal in real time to your device to verify the call is legitimate and truly coming from the contact's device."

This digital handshake uses end-to-end encrypted RCS (Rich Communication Services). If you're being scammed by an impersonator, your phone will notice that the "initial confirmation signal will be missing," and ping the contact's real device to double-check. If their real device says, "I'm not making a call right now," you'll get a warning on your screen advising you to hang up immediately. This feature will be available globally on Android 12+ phones starting with Pixel devices this month. Fake call detection is enabled by default but can be turned off at any time. Google says itâ(TM)s "possible for other apps and device manufacturers to adopt this technology" given the RCS underpinnings. You can learn more about fake call detection in Google's blog post.

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