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Q1) Consider an improved version of the Vigenere cipher, where instead of using multiple shift ciphers, multiple mono-alphabetic substitution ciphers are used. That is, the key consists of t random permutations of the alphabet, and the plaintext characters inpositions i; t+i; 2t+i, and so on, are encrypted using the ith permutation. Show how to break this version of the cipher.

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