Kerberos

This document provides an overview of the Kerberos network authentication protocol. It discusses that Kerberos was developed at MIT to allow secure authentication over insecure networks. It provides a high-level overview of how Kerberos uses tickets and session keys to authenticate users and allow access to services without reentering passwords. The document also summarizes the Needham-Schroeder protocol that inspired part of Kerberos' design and discusses some applications and weaknesses of the Kerberos protocol.