Question 1 [5 Marks] Automated Teller Machines (ATM) are designed so that users will provide a personal identification number (PIN) and a card to access their bank accounts. Give examples of confidentiality, integrity and availability requirements associated in such a system and describe the degree of importance for each requirement. Question 2 [5 Marks] A thief broke into an Automated Teller Machine (ATM) using a screwdriver and was able to jam the card reader as well as breaking five keys from the keypad. The thief had to halt the process of break- in and hide, as a customer approached to use the ATM. The customer was able to successfully enter their ATM card, punch in the 4 digit PIN and was able to draw out some cash. Since the card reader was jammed, the customer was however not able to withdraw the ATM card, and drove off to seek some help. In the meantime, the thief came back and decided to try to discover the customer's PIN so that he can steal money from the customer You are required to calculate the maximum number of PINs that the thief may have to enter before correctly discovering the customer's PIN? Question 3 [5 Marks] Thinking about bio-metric authentication, list three reasons why people may be reluctant to use bio- metrics. Describe various ways of how to counter those objections