ISC Exam Questions

Kerberos provides an integrity check service for messages between two entities through the use of:

Kerberos provides an integrity check service for messages between two entities through the use of:

A.
A trusted, third-party authentication server

B.
A checksum

C.
Credentials

D.
Tickets

Explanation:
Achecksum that is derived from a Kerberos message is used to verify the integrity of the message.
This checksum may be a message digest resulting from the application of a hash function to the
message. At the receiving end of the transmission, the receiving party can calculate the message
digest of the received message using the identical hash algorithm as the sender. Then the message
digest calculated by the receiver can be compared with the message digest appended to the
message by the sender. If the two message digests match, the message has not been modified en
route, and its integrity has been preserved. For answers Credentials and Tickets are authenticators
used in the process of granting user access to services on the network. Answer “A trusted, thirdparty authentication server” is the AS or authentication server that conducts the ticket-granting
process.