hello people,

i was given a task to complete which involes a cliet a kdc and a server.
(n* is a nounce.)

1. client sends a null value to the server.
2. server sends back n1 encrypted with its secret key.
3. client sends its name,servers name, and the (n1), and a n2 to KDC
4. KDC sends back a session key, a tkt, n2, back to the client.
tkt is for the server as most of you may know. tkt contains (session ky, decrypted n1 and clients name) encrypted with servers secret key.
5. client sends the tkt and a message encrypted with the session key to the server after decrypting what he received from KDC.
6. server decryptes the tkt and obtain the session key and creates another message with and encrypt that message with the session key and sends back to the client.

That's it...

one thing.. you have the access to the router... so you can see and get all the messeges passing through client, kdc and server.

now the question is how to obtain the decrypted msg sent from client to server in the 5th step. any ideas?
thanks