WhatsApp is adding another security layer for WhatsApp Web and desktop app linking and logging in. Before users link their WhatsApp accounts to their computer, they will be asked to authenticate using fingerprint or Face ID. This additional layer of security is aimed at preventing others from linking your WhatsApp account to the computer without your presence. WhatsApp says that the face and fingerprint authentication takes place on the user’s mobile phone in a privacy-preserving manner and WhatsApp cannot access the biometric information stored on the handset’s operating system.
“This will limit the chance that a housemate or officemate (when we have those again) can link devices to your WhatsApp account without you. This builds on our existing security measures today, which pop up a notice in your phone whenever a Web/Desktop login occurs, and the ability to unlink devices from your phone at any time,” WhatsApp explains in an official release.