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    Cryptography : Key distribution protocol exam question

    Need help with a past exam question: Alice and Bob want to establish a shared key KAB with the help of a trusted server D. Presume Bob and Alice share their secret keys KAD and KBD with D and that nonces is 64 bits long and keys are 128 bits long. A > B = Alice,NA B > D = Bob,NB,{A,NA,NB}KBD D...