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Product showcase: Proton Authenticator is an end-to-end encrypted, open source 2FA app

ID: 22896e4f-4191-5286-9acd-88fd6f163e53

STIX ID: report--22896e4f-4191-5286-9acd-88fd6f163e53

Feed Name: Help Net Security

Date Published: 2026-04-06

Date Updated: 2026-04-28

Author: Anamarija Pogorelec

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Proton Authenticator is a free, open-source TOTP two-factor authentication app available on Windows, macOS, Linux, iOS, and Android; the report outlines installation, account setup (QR code or setup key), code generation (six-digit codes refreshed every 30 seconds), cross-device encrypted sync, local code generation for offline use, import/export and backup options, and device access protections such as PIN or biometrics.

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