- RFC 6238
- http://ecki.github.com/et-otp/
- pode utilizar o mesmo código em diversos aparelhos desde que o QR-Code seja salvo ou ativado nos diversos dispositivos
- http://aws.amazon.com/mfa/
- Clientes
- FreeOTP
- https://github.com/harvardinformatics/JAuth
- https://github.com/gbraad/gauth
- http://www.nongnu.org/oath-toolkit/
- http://www.analyth.com/en/allarticles-en/gauth-and-oathtool-authenticator-2fa-for-gnulinux/http://www.analyth.com/….
- https://chrome.google.com/webstore/detail/authenticator/bhghoamapcdpbohphigoooaddinpkbaihttps://chrome.google.com/….
- Google Authenticator
- Authy
- Lastpass
- https://github.com/pyotp/pyotp
- https://www.kaspersky.com.br/blog/best-authenticator-apps-2022/18769/https://www.kaspersky.com.br/…./18769
- Servidores
- https://github.com/mricon/totp-cgi/
- Linux / PAM / SSH
- google-authenticator -t -d -r3 -R30 -w1 -l NOME_PARA_TOKEN
- http://www.cyberciti.biz/open-source/howto-protect-linux-ssh-login-with-google-authenticator/http://www.cyberciti.biz/….
- https://www.linux.com/blog/securing-ssh-two-factor-authentication-using-google-authenticatorhttps://www.linux.com/….
- https://isc.sans.edu/forums/diary/How+To+Setting+Up+Googles+TwoFactor+Authentication+In+Linux/16270/https://isc.sans.edu/…./16270
- http://blog.nowherelan.com/2014/01/04/two-step-authentication-for-ssh-on-centos-6-using-google-authenticator/http://blog.nowherelan.com/….
- https://www.palepurple.co.uk/two-factor-authentication-for-remote-ssh-users-using-google-authenticatorhttps://www.palepurple.co.uk/….
- Utilizando pam_access para liberar acessos locais
- OpenLDAP - 2015-07
- Bibliotecas / Códigos / Tutoriais
- http://invariantproperties.com/2011/12/23/using-google-authenticator-totp-on-your-site/http://invariantproperties.com/….
- http://thegreyblog.blogspot.com.br/2011/12/google-authenticator-using-it-in-your.htmlhttp://thegreyblog.blogspot.com.br/….
- http://www.javacodegeeks.com/2011/12/google-authenticator-using-it-with-your.htmlhttp://www.javacodegeeks.com/….
- https://code.google.com/p/ga4php/
- https://github.com/wstrange/GoogleAuth
- http://code.google.com/p/google-authenticator/source/browse/#git%2Fmobilehttp://code.google.com/…./#git%2Fmobile
- http://code.google.com/p/gauthj2me/
- http://code.google.com/p/lwuitgauthj2me/
- http://www.rcdevs.com/products/openotp/