Consider an automated teller machine (atm) in which users provide a personal identification number (pin) and a card for account access. Give examples of confidentiality, integrity, and availability requirements associated with the system and, in each case, indicate the degree of importance of the requirement.
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User uses ATM machine and ATM PIN to access his personal account using the ATM and that’s why the users wants the PIN to be confidential in host System during transactions because the unsecure ATM PIN during communication between the system and the bank server can lead to loss of account data. Therefore, PIN should be secretly encrypted.
User always wants the transactions records with no unwanted changes. If user deposits 200 and the account balance is 600. When user gets a message that his account has been updated as 500 instead of 800 then it causes unexpected loss of amount. So, the integrity of transaction should be safe.
All time the ATM machine should be available because it helps in the growth of bank.
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