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Which of the following authentication services uses a ticket granting system to provide access?
Correct Answer: D
Section: Access Control and Identity Management Explanation/Reference: Explanation: The basic process of Kerberos authentication is as follows: 1 2 3 . The subject provides logon credentials. . The Kerberos client system encrypts the password and transmits the protected credentials to the KDC. . The KDC verifies the credentials and then creates a ticket-granting ticket (TGT-a hashed form of the subject's password with the addition of a time stamp that indicates a valid lifetime). The TGT is encrypted and sent to the client. 4 5 6 . The client receives the TGT. At this point, the subject is an authenticated principle in the Kerberos realm. . The subject requests access to resources on a network server. This causes the client to request a service ticket (ST) from the KDC. . The KDC verifies that the client has a valid TGT and then issues an ST to the client. The ST includes a time stamp that indicates its valid lifetime. 7 8 9 . The client receives the ST. . The client sends the ST to the network server that hosts the desired resource. . The network server verifies the ST. If it's verified, it initiates a communication session with the client. From this point forward, Kerberos is no longer involved.