"Tom Yu" <[EMAIL PROTECTED]> schrieb...
> Kerberos doesn't use symmetric-key Needham-Schroeder directly; it has
> been modified to use timestamps to avoid a freshness problem found by
> Burrows et al. in the BAN logic paper.  Also, Lowe's attack was on
> public-key Needham-Schroeder, if I recall correctly.

Thanks, Tom. This means, Lowe's attack doesn't touch kerberos!?
2 other questions:
Kerberos uses symmetric keys. How can it guarantee, that a message/ticket
was not altered (integrity)?
How does logout work?

I really looked around but found no answers.


Chris



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