The company has introduced Proton Authenticator, an open-source two-factor authentication app that can sync 2FA codes across devices using end-to-end encryption. Though Proton’s password manager already comes with a built-in 2FA feature, Proton says using its standalone Authenticator offers an “extra layer of security” by generating codes in a separate app.
Proton Authentication is available for free on Android, iOS, Windows, macOS, and Linux.