Kerberos depends upon what encryption method?

A.
Public Key cryptography.

B.
Secret Key cryptography.

C.
El Gamal cryptography.

D.
Blowfish cryptography.

Explanation:
Kerberos makes use of symmetric key cryptography and offers end-to-end security. The majority Kerberos
implementations works with shared secret keys.
Incorrect Answers:
A: Kerberos makes use of symmetric key cryptography, which does not include the use of public keys.
C: El Gamal is a public key algorithm.
D: Blowfish cryptography is a symmetric-key block cipher that is unpatented, and has a weak class of keys.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 782, 818
https://en.wikipedia.org/wiki/Kerberos_(protocol)
http://en.wikipedia.org/wiki/Blowfish_(cipher)
http://en.wikipedia.org/wiki/El_Gamal
http://www.mrp3com/encrypt.html