Which of the following is NOT part of the Kerberos authentication protocol?

A.
Symmetric key cryptography

B.
Authentication service (AS)

C.
Principals

D.
Public Key

Explanation:
Kerberos is based on symmetric key cryptography, not asymmetric key cryptography, which is also called public
and private keys.
Incorrect Answers:
A: Kerberos is based on symmetric key cryptography.
B: The authentication service is the part of the KDC that authenticates a principal
C: Principals can be users, applications, or network services that receive security services from the KDC.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 209-213, 782