Overview

• The app’s open source code base and end-to-end encryption ensure that 2FA tokens remain private and auditable by independent security reviewers.
• Users can import existing tokens and choose between local storage or encrypted cloud backups synced across devices via an optional Proton account.
• Native desktop clients join mobile versions, enabling cross-platform access without ads, trackers or vendor lock-in.
• Offline time-based one-time-password generation works alongside biometric or PIN locking to secure access without internet connectivity.
• Microsoft’s removal of password autofill in its Authenticator app highlighted a gap that Proton Authenticator now addresses as part of Proton’s expanding suite following its AI chatbot launch.