Given the regularity of data breaches and the ubiquity of phishing schemes that aim to compromise your data, you should have multi-factor authentication (MFA) enabled on any account that offers this extra layer of security.

Proton Authenticator is a new 2FA app with encrypted sync, offline support, and no lock-in — all completely free and open source.

Proton introduced its very first two-factor authentication app on Thursday. Now available across Android, iOS, Windows, macOS, and Linux, Proton Authenticator is an open-source alternative to mainstream authenticator services that lack key security features and user control options.