In the recent Facebook data breach, even Mark Zuckerberg’s data was leaked. It leaked the personal information of 533 Million Facebook users. The data included personal information including phone number, address, and personal identifier. It was the same in the case of Mark Zuckerberg. His name, phone number, location, marriage details, birth date, and Facebook user ID were all leaked. From his phone number, a security researcher exposed Mark Zuckerberg. The Facebook CEO himself is using Signal, a messaging app that is one of the biggest competitors of WhatsApp.