A storage device that comprises of one or more inflexible, circular platters that stores the data, instruction and information with the help of magnetic particles is hard disk. Hence, the correct option is “ A ”.

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Let the user choose encryption or decryption. For encryption, let user input the key in Hexadecimal number, the plain text in Hexadecimal number, output the ciphertext (in hexadecimal numbers). For decryption, let user input the key in Hexadecimal number, the ciphertext (in hexadecimal numbers), output the decrypted message (Hexadecimal number). Both encryption and decryption should output the different operation results for each round like the following: For example: Round 1: E(R0) = ...... (Hex or Binary) K1 = …… E(Ro) xor K1 = S-box outputs = …… f(Ro1, K1) = ….. L2 =R1 =……. La = Ra Round 2: .....• No Encryption/Decryption libraries or functions provided by the third party are allowed. Submit your program codes to Moodle with the notes of how to compile and run your program.

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Chapter 8, Problem 2MC

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A storage device that comprises of one or more inflexible, circular platters that stores the data, instruction and information with the help of magnetic particles is hard disk.

Hence, the correct option is “A”.

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Let the user choose encryption or decryption. For encryption, let user input the key in Hexadecimal number, the plain text in Hexadecimal number, output the ciphertext (in hexadecimal numbers). For decryption, let user input the key in Hexadecimal number, the ciphertext (in hexadecimal numbers), output the decrypted message (Hexadecimal number). Both encryption and decryption should output the different operation results for each round like the following: For example: Round 1: E(R0) = ...... (Hex or Binary) K1 = …… E(Ro) xor K1 = S-box outputs = …… f(Ro1, K1) = ….. L2 =R1 =……. La = Ra Round 2: .....• No Encryption/Decryption libraries or functions provided by the third party are allowed. Submit your program codes to Moodle with the notes of how to compile and run your program.

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