Question: Alice uses the Hill cipher, encrypting the plaintext Consistency is the last refuge of the unimaginative to get the ciphertext voqimugocogmttfkxvlvdynhawugtfrsksoizgaanlygk which she send to

Alice uses the Hill cipher, encrypting the plaintext

Consistency is the last refuge of the unimaginative

to get the ciphertext

voqimugocogmttfkxvlvdynhawugtfrsksoizgaanlygk

which she send to Bob using blocks of size m = 3 (and n = 26). Find the matrix used for encryption. The matrix key spells out a keyword: what is it? After you nd the key, notice that Alice has not followed the protocol correctly. Find two plaintexts that encrypt to the same ciphertext.

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