From Teach Me IT
General Security Concepts 

...rname/password, certificates, kerbos, Challenge Handshake Authentication Protocol (
CHAP), token, multifactor, biometric, and mutual authentication. In addition, the course focuses on auditing, various kinds of security attacks, malignant code and the associated types of the malignant codes. The course also covers the scanning techniques, such as
Transmission Control Protocol (
TCP),
Internet more...