Some integration has occurred already with a working client system that authenticates using Kerberos, then authenticates successfully with Moodle, Samba and Squid using Kerberos credentials.

It generates a PIN, which you then authenticate using.

A: If you are trying to authenticate using your address instead of your account number, please make sure to enter your postal code without any spaces.

Self-service password reset software enables users who forgot their password or triggered an intruder lockout to authenticate using another mechanism and resolve their own problem, without calling an IT help desk.

Option to place boot loader on external medium and to authenticate using the key medium.

Since SAML only works within the browser, a desktop based web application client can not successfully authenticate using SAML.

Windows 8 also allow users to directly authenticate into their PCs using their Microsoft account, rather than a local or domain user.

So they authenticate using their Facebook credentials.

If the adversary knows the system, a common assumption, then he will simply force the user to authenticate twice using different passwords and gain access on at least one of the two attempts.

So you click that, and you're into PayPal without having to authenticate using your security token.