1. 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. (10 points) 2. Please explain the functionalities for the following commands: (20 points) a. history | grep awk b. Is -1 | grep date | awk '{print $6, $7, $8, $9}' c. cat test test sort grep song d. Is - | awk '{print $9}' | grep song | sort 3. This problem uses a real-world example of a symmetric cipher, from an old U.S. Special Forces manual (public domain). The document, filename Special Forces.pdf, is available at canvas (homework/hw-1/Special Forces.pdf). (20 points) a. Using the two keys (memory words) cryptographic and network security, encrypt the following message: Be at the third pillar from the left outside the lyceum theatre tonight at seven. If you are distrustful bring two friends." Make reasonable assumptions about how to treat redundant letters and excess letters in the memory words and how to treat spaces and punctuation. Indicate what your assumptions are. Note: The message is from the Sherlock Holmes novel The Sign of Four. b. Decrypt the ciphertext. Show your work. c. Comment on when it would be appropriate to use this technique and what its advantages are. 1. 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. (10 points) 2. Please explain the functionalities for the following commands: (20 points) a. history | grep awk b. Is -1 | grep date | awk '{print $6, $7, $8, $9}' c. cat test test sort grep song d. Is - | awk '{print $9}' | grep song | sort 3. This problem uses a real-world example of a symmetric cipher, from an old U.S. Special Forces manual (public domain). The document, filename Special Forces.pdf, is available at canvas (homework/hw-1/Special Forces.pdf). (20 points) a. Using the two keys (memory words) cryptographic and network security, encrypt the following message: Be at the third pillar from the left outside the lyceum theatre tonight at seven. If you are distrustful bring two friends." Make reasonable assumptions about how to treat redundant letters and excess letters in the memory words and how to treat spaces and punctuation. Indicate what your assumptions are. Note: The message is from the Sherlock Holmes novel The Sign of Four. b. Decrypt the ciphertext. Show your work. c. Comment on when it would be appropriate to use this technique and what its advantages are