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I have two questions about the secret key system used by Kerberos. I realize that the client secret key is developed using the password and a one way hash function. Chapter 12 states that it is a temporarily stored on the client workstation. How long does temporarily mean?

Second on page 339, it references the above temporary secret key on the client workstation and in the next paragraph it mentions a permanent secret key. Is that in reference to the fact that the client secret key is also stored on the KDC server that has the AS and TGS applications? Thanks in advance for any insght.