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Modeling Copy Card with Hash Values (1)

We begin with UML sequence diagrams getBalance, load, and pay:

• The CardOwner can check the balance of his/her copycard.

       

• To load mony onto a card the card must be sure that the DepositMachine is genuine. Therefore an authentication step is required before the actual load message can be sent.

       

• For payment the CopyingMachine must be sure that the card is genuine. The necessary information is contained in the response from the card.

       


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