Two-factor authentication with SMS or app-generated codes prevents phishing attacks.

Is it true that two-factor authentication with SMS or app-generated codes prevents phishing attacks?

Partly. Sources disagree in part: FTC consumer guidance and an overview of HOTP/TOTP present 2FA as added protection when passwords are phished, while peer-reviewed work on SMS phishing, password-reset man-in-the-middle attacks, and SIM-swap social engineering shows SMS or app-code 2FA can still be defeated. None of the placed items fully settles whether 2FA prevents phishing attacks.

Verdict: CONTESTED PARTIAL · 3 sources for, 4 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Use Two-Factor Authentication To Protect Your Accounts | Consumer Advice. (n.d.). consumer.ftc.gov. https://consumer.ftc.gov/articles/use-two-factor-authentication-protect-your-accounts

Jakobsson, M. (2018). Two-factor inauthentication – the rise in SMS phishing attacks. doi.org. https://doi.org/10.1016/s1361-3723(18)30052-6

Two-Factor Authentication 2FA: An Overview of HOTP and TOTP. (2023). zenodo.org. https://zenodo.org/records/17919645

Two Factor Authentication by Using SMS for Web Based Application. (2020). doi.org. https://doi.org/10.30534/ijiti/2020/02962020

Impact Assessment of Password Reset PRMitM Attack with Two-Factor Authentication. (n.d.). cir.nii.ac.jp. https://doi.org/10.1109/desec.2018.8625132

Sivarani, J. & al, e. (2026). Reinventing Authentication through User-Centric Two-Factor Security and Personalized Image Verification. zenodo.org. https://doi.org/10.5281/zenodo.18683037

Increased Use of Two-Factor Authentication Force New Social Engineering Tactics. (2018). gateway.proquest.com. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqm&rft_dat=xri:pqdiss:10789454