HP 635n Practical IPsec Deployment for Printing and Imaging Devices - Page 135

TGS-REQ

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Session key. Notice that it also exists in the TGT. Let's see how it is used - refer to Figure 55 - TGSREQ. Figure 55 - TGS-REQ Here we can see that the Authenticator is used to communicate to the TGS in the TGS-REQ packet. The Authenticator is using the session key that was sent back in the AS-REP packet. In addition the TGT is also included. Oh, and of course, the information about what Ticket Vista would like to receive from the TGS. As if we didn't have enough keys already, the TGS-REP packet introduces a new key. Refer to Figure 56 - TGS-REP. 135

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135
Session key.
Notice that it also exists in the TGT.
Let’s see how it is used – refer to Figure 55 – TGS-
REQ.
Figure 55 – TGS-REQ
Here we can see that the Authenticator is used to communicate to the TGS in the TGS-REQ packet.
The Authenticator is using the session key that was sent back in the AS-REP packet.
In addition the
TGT is also included.
Oh, and of course, the information about what Ticket Vista would like to
receive from the TGS.
As if we didn’t have enough keys already, the TGS-REP packet introduces a
new key. Refer to Figure 56 – TGS-REP.