(a) Show how the unknown key entries ki can be solved given a sufficient number (at least three) known plaintext-ciphertext pairs

(a) Show how the unknown key entries ki can be solved given a sufficient number (at least three)
known plaintext-ciphertext pairs.
(b) Show how the computations can be simplified with a chosen plaintext attack by selecting the three
plaintexts in an appropriate way. (In chosen plaintext attack the adversary has access to the encryption
device. It can feed in chosen plaintext and read out the corresponding ciphertext.)(a) Show how the unknown key entries ki can be solved given a sufficient number (at least three)
known plaintext-ciphertext pairs.
(b) Show how the computations can be simplified with a chosen plaintext attack by selecting the three
plaintexts in an appropriate way. (In chosen plaintext attack the adversary has access to the encryption
device. It can feed in chosen plaintext and read out the corresponding ciphertext.)