Due: Sept 29, 2020 at 10:00am. No late assignments will be accepted.
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The management for a KDC would like to help facilitate a moving target defense by allowing any user A to periodically replace shared key K_A with a new value. So the following protocol has been proposed for key-refresh:
At the end of step 2, KDC and A both store newKey as the new value for key K_A.
Step | Variable | Can it be deleted? | Reason |
---|---|---|---|
Step 1 | n | ||
A | |||
B | |||
Step 2 | n | ||
A | |||
B | |||
Step 3 | n | ||
Step 4 | n |