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8. Show that you have a language with only the three letters a, b, c and they occur with frequency 0.7,0.2,0.1 respectively. The following ciphertext

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8. Show that you have a language with only the three letters a, b, c and they occur with frequency 0.7,0.2,0.1 respectively. The following ciphertext was encrypted by the Vigenere cipher 'CAAABBCACBCABACAABCCCACA' Show that it is likely that the key length is 2 and determine the most probable key

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