2 factor authentication sites - SERP Analysis

https://2fa.directory/

https://2fawebsites.github.io/

https://authy.com/

https://www.pcmag.com/how-to/multi-factor-authentication-2fa-who-has-it-and-how-to-set-it-up

https://www.nytimes.com/wirecutter/reviews/best-two-factor-authentication-app/

https://www.reddit.com/r/2fa/comments/lrilol/best_site_that_provided_a_list_of_sites_with_two/

https://auth0.com/learn/two-factor-authentication

https://2fas.com/

https://support.1password.com/one-time-passwords/

https://www.browserscan.net/2fa

https://www.login.gov/help/get-started/authentication-methods/

https://github.com/2factorauth/twofactorauth

https://www.wordfence.com/help/tools/two-factor-authentication/

https://www.timeatlas.com/two-factor-authentication/

https://www.yubico.com/

https://consumer.ftc.gov/articles/use-two-factor-authentication-protect-your-accounts

https://support.google.com/accounts/answer/1066447?hl=en&co=GENIE.Platform%3DAndroid

https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en_US

https://brainstation.io/cybersecurity/two-factor-auth

https://help.twitch.tv/s/article/two-factor-authentication?language=en_US

https://cloud.google.com/identity-platform/docs/web/mfa

https://infosecguide.wordpress.com/2016/01/07/22-sites-where-you-should-enable-two-factor-authentication-right-now/

https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa

https://www.spiceworks.com/it-security/identity-access-management/articles/two-factor-authentication-vendors/

https://www.microsoft.com/en-us/security/business/security-101/what-is-two-factor-authentication-2fa

https://duo.com/product/multi-factor-authentication-mfa/duo-mobile-app

https://support.google.com/accounts/answer/185839?hl=en&co=GENIE.Platform%3DDesktop

https://security.stackexchange.com/questions/246529/2-factor-authentication-everywhere-is-this-possible

https://www.microsoft.com/en-us/security/mobile-authenticator-app

https://support.apple.com/en-us/102660

https://swoopnow.com/two-factor-authentication-guide/

https://chromewebstore.google.com/detail/2fa-authenticator/gmohoglkppnemohbcgjakmgengkeaphi

https://9to5mac.com/2022/09/30/use-two-factor-authentication/

https://www.theverge.com/23612381/two-factor-authentication-2fa-amazon-twitter-how-to

https://www.quora.com/What-is-the-most-secure-way-of-2-factor-authentication-Sending-code-to-the-phone-number-or-email-or-authenticator-apps-like-Microsoft-Google

https://help.x.com/en/managing-your-account/two-factor-authentication

https://www.techtarget.com/searchsecurity/definition/two-factor-authentication

https://www.rippling.com/blog/mfa-providers

https://www.daito.io/2fa/

https://safety.google/authentication/

https://www.pcmag.com/picks/the-best-authenticator-apps

https://help.tableau.com/current/online/en-us/to_security_mfa.htm

https://en.wikipedia.org/wiki/Multi-factor_authentication

https://cpl.thalesgroup.com/access-management/two-factor-authentication-2fa

https://proton.me/blog/what-is-two-factor-authentication-2fa

https://www.privacyguides.org/en/basics/multi-factor-authentication/

https://www.quora.com/Which-websites-really-need-two-factor-authentication

https://www.fidelity.com/security/extra-security-login

https://www.dropbox.com/resources/what-is-2fa

https://www.cyber.gov.au/protect-yourself/resources-protect-yourself/personal-cybersecurity-guides/protect-yourself-multi-factor-authentication

https://www.cisco.com/site/us/en/learn/topics/security/what-is-two-factor-authentication.html

https://getaegis.app/

https://developers.cloudflare.com/fundamentals/account/account-security/2fa/

https://www.eff.org/deeplinks/2017/09/guide-common-types-two-factor-authentication-web

https://us.norton.com/blog/privacy/what-is-2fa

https://help.soundcloud.com/hc/en-us/articles/20707203094043-Two-Factor-Authentication

https://www.twilio.com/docs/glossary/what-is-two-factor-authentication-2fa

https://www.ncsc.gov.uk/guidance/setting-2-step-verification-2sv

https://www.verifyr.com/en/otp/authenticator

https://www.epicgames.com/help/en-US/c-Category_EpicAccount/c-AccountSecurity/two-factor-authentication-2fa-and-how-to-enable-it-a000084651

https://www.uis.edu/its/it-security/two-factor-authentication-2fa

https://www.oswego.edu/cts/two-factor-authentication

https://community.spiceworks.com/t/looking-for-two-factor-authentication-for-non-domain-systems/743451

https://security.stackexchange.com/questions/276832/what-2fa-should-i-use-for-my-website-login-and-what-are-the-risks-of-2fa

https://chromewebstore.google.com/detail/authenticator/bhghoamapcdpbohphigoooaddinpkbai

https://cnet.uchicago.edu/2FA

https://www.files.com/docs/security/twofactor-authentication-2fa

https://www.onelogin.com/learn/what-is-mfa

https://expertinsights.com/user-auth/the-top-free-authenticator-apps

https://www.lastpass.com/solutions/authentication/two-factor-authentication

https://frontegg.com/blog/multi-factor-authentication-types

https://www.syteca.com/en/two-factor-authentication-tool

https://authenticator.2stable.com/

https://freedom.press/digisec/blog/2fa-beginners/

https://oit.duke.edu/service/authentication/

https://vip.symantec.com/

https://safeonweb.be/en/2fa

https://apps.apple.com/us/app/microsoft-authenticator/id983156458

https://www.fortinet.com/resources/cyberglossary/two-factor-authentication

https://www.kaspersky.com/blog/types-of-two-factor-authentication/48446/

https://www.protectimus.com/blog/10-most-popular-2fa-apps-on-google-play/

https://bitwarden.com/help/setup-two-step-login/

https://www.staysafeonline.org/articles/multi-factor-authentication

https://www.okta.com/identity-101/which-industries-require-2fa/

https://www.daito.io/

https://zitadel.com/blog/2fa-bypass-attacks

https://solidwp.com/security/wordpress-two-factor-authentication/

https://www.authy.com/what-is-2fa/

https://support.activision.com/articles/using-two-factor-authentication-with-an-activision-account

https://help.salesforce.com/s/articleView?id=sf.security_overview_2fa.htm&language=en_US&type=5

https://www.knowbe4.com/multi-factor-authentication

https://www.imperva.com/learn/application-security/2fa-two-factor-authentication/

https://www.youtube.com/watch?v=hlpoc3C1kWM

https://libguides.uah.edu/passwords/2fa

https://www.cisa.gov/MFA

https://docs.wpvip.com/security/two-factor-authentication/