Facebook-leaked phone number reveals that Mark Zuckerberg uses Signal
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Facebook CEO Mark Zuckerberg's phone number is among the personal data of 533 million Facebook users that was leaked recently. Dave Walker, a security researcher on Twitter revealed that Zuckerberg has an account on the Signal app. The news is ironic because, while Facebook-owned WhatsApp's new privacy policy is facing global outrage, Zuckerberg himself has an account on the rival messaging platform.