# Viganere cipher and Hill cipher

• September 04, 2024/

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. Have a function with the name “vigenere_enc” that accepts a string as its first and second argument and returns a string.
e.g., function call: vigenere_enc(‘KEY’, ‘Test String’) should return a string ‘DIQDWRBMLQ’

. Have a function with the name “vigenere_dec” that accepts a string as its first and second argument and returns a string.
e.g., function call: vigenere_dec(‘KEY’, ‘DIQDWRBMLQ’) should return a string ‘TESTSTRING’

. Have a function with the name “hill_enc” that accepts a Matrix (3×3) as its first argument and a string as its second argument and returns a string. This function should make sure that the processed input string is padded with “X” or “XX” to make the input length a multiple of 3.
e.g., function call: hill_enc(M, ‘Test String’) should return a string ‘BPBLJCPRGHQO’; where M has the value as shown in the code snippet below:
using numpy as np
M = np.array([[17,17,5],[21,18,21],[2,2,19]])

. Have a function with the name “hill_dec” that accepts a Matrix (3×3) as its first argument and a string as its second argument and returns a string. This function should make sure that the processed input string is padded with “X” or “XX” to make the input length a multiple of 3.
e.g., function call: hill_dec(M, ‘BPBLJCPRGHQO’) should return a string ‘TESTSTRINGXX’; where M has the value as shown in the code snippet below:
using numpy as np
M = np.array([[17,17,5],[21,18,21],[2,2,19]])

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