[SOLVED] Csci 430: introduction to computer and network security assignment 1

Problem 1: Write a program for the one-time pad encryption scheme. Your program
should include key generation, encryption, and decryption procedures.1. Input: your program should take command line arguments, ask the user if they
want to encrypt or decrypt the message, if they want to encrypt the message, it
would take plaintext message as an input, and if they want to decrypt the
message, it would take ciphertext as input.2. Output: your program should print the ciphertext if the user encrypts the
message and print the plaintext if the user decrypts the message.Problem 2: Write two programs to encrypt messages of arbitrary length using AES as a
block cipher: the first program should use AES CBC mode and the second should use
AES CTR mode. Your programs should include key generation, encryption, and
decryption procedures.1. Input: your program should take command line arguments, ask the user if they
want to encrypt or decrypt the message, if they want to encrypt the message, it
would take plaintext message as an input, and if they want to decrypt the
message, it would take ciphertext as input.2. Output: your program should print the ciphertext if the user encrypts the
message and print the plaintext if the user decrypts the message.Problem 3: Write a program to encrypt messages of arbitrary length using AES block
cipher in an appropriate authenticated mode of encryption, such that it provides both
secrecy and integrity. Your programs should include key generation, encryption, and
decryption procedures.• Input: your program should take command line arguments, ask the user if they
want to encrypt or decrypt the message, if they want to encrypt the message, it
would take plaintext message as an input, and if they want to decrypt the
message, it would take ciphertext as input.• Output: If the user wants to encrypt the message, your program should print the
ciphertext and the authentication tag and if the user wants to decrypt the
message, it should print the plaintext only if the authentication tag is valid and
print an “invalid” if the authentication tag is invalid.Problem 4: Write a program to implement a CBC-MAC for arbitrary length messages
using AES as block cipher. Your program should include key generation, tag
generation, and verification procedures.• Input: your program should take command line arguments, ask the user if they
want to generate or verify the authentication tag, if they want to generate the tag,
it would take message as an input, and if they want to verify the tag, it would take
both the message and the tag as input.• Output: If the user wants to generate the tag, your program should print the
authentication tag and if the user wants to decrypt the message, it should print
“valid” if the tag is valid and print “invalid” if it is not.