![]() ![]() Bitwarden Password Manager (required premium account for TOTP support). ![]() I have compared the following TOTP apps for the mobile platforms Android and iOS: The method is called Time-Based One-Time Password Algorithm (TOTP) and is standardized in RFC 6238. You probably use an “authenticator app” such as Google Authenticator to enable two-step verification (sometimes called two-factor authentication, 2FA, or multi-factor authentication, MFA) for an online account. This year I’ve included seven (7) new apps however. Not much has changed in the tested apps since then. This year I don’t write comments on the individual apps and I don’t include any screenshots. If you’ve recently read it or you are just interested in the results in this 2023 edition, you might want to skip to the Tested Apps section. Most of the text, like an introduction to the concepts, is copied here so there is no need to revisit unless you are interested in the apps’ support back then. ![]() So this is an update to the blog post I published in July 2019 called Many Common Mobile Authenticator Apps Accept QR Codes for Modes They Don’t Support. I felt I needed to refresh my TOTP algorithm support investigation from 2019 before the recording of the next episode of the Bli säker podcast. Last week my favorite IT security podcast Bli säker ( Become Secure in English) published the episode The Epochalypse and the QR Code (only in Swedish) where they explained the techonology behind mobile authenticator apps. Mobile Authenticator Apps Algorithm Support Review - 2023 Edition ![]()
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