According to WABetaInfo, a future update will require fingerprint authentication for new logins to WhatsApp Web. This will add enhanced security to the app since WhatsApp web is a popular way to spy on other’s WhatsApp chats.
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WhatsApp Web allows you to access your WhatsApp chats on a laptop, PC, Mac (or even tablet). Currently, Whatsapp users need to scan a QR Code to sign in to WhatsApp Web.
With the new update, users can prevent new logins to WhatsApp web until fingerprint authentication is completed within the mobile app. So only you can approve sign-ins to WhatsApp Web.
It’s not clear if the fingerprint authentication option will replace the QR code scanning currently in use. However, it could simply be an optional security feature for users that want to limit access to their chats.
This feature is currently under development and is expected to roll out in future updates. Moreover, it will help improve privacy as it prevents external access to your chats if someone is temporarily using your phone.