Kerberos is the name of a computer network authentication protocol, which allows individuals communicating over a non-secure network to prove their identity to one another in a secure manner.
Kerberos is the default authentication method in Windows 2000 onwards. There are two main tools used to manage Kerberos tickets on Windows-based systems:
klist.exe - A command line utility to manage kerberos tickets. klist can be used in scripts.
kerbtray.exe - kerbtray a GUI application to manage kerberos tickets.