There are parallels between the trust models in Kerberos and Public Key Infrastructure (PKI). When we
compare them side by side, Kerberos tickets correspond most closely to which of the following?

A.
public keys

B.
private keys

C.
public-key certificates

D.
private-key certificates

Explanation:
A Kerberos ticket is issued by a trusted third party. It is an encrypted data structure that includes the service
encryption key. In that sense it is similar to a public-key certificate. However, the ticket is not the key.
Incorrect Answers:
A: Kerberos tickets are not shared out publicly, so they are not like a PKI public key.
B: Although a Kerberos ticket is not shared publicly, it is not a private key. Private keys are associated with
Asymmetric crypto system which is not used by Kerberos. Kerberos uses only the Symmetric crypto system.D: There is no such thing as a private key certificate.