Kerberos: A ticket-based authentication protocol, in which “tickets” are used to identify users, developed on Massachusetts Institute of Technology (MIT).
Key Logging: The practice of recording keystrokes, usually for illicit purposes, such as acquiring user IDs, passwords, and other confidential information.
Known-plaintext attack: An attack technique in which the cryptanalyst has a given plaintext message and the result ciphertext.
KryptoKnight: A ticket-based single sign-on (SSO) authentication system, in which “tickets” are used to identify users. Developed by IBM.