durée estimée : 15 Minutes The alphabet contains characters, we use an af...
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durée estimée : 15 MinutesThe alphabet contains characters, we use an affine Vigenere's transformation system based on 2x2 matrices .Here are two ciphering keys :1) Among those two keys, only one is correct. Which of the two keys is correct ?2) Calculate the deciphering key corresponding to the correct key.3) Decipher the following bigram : .
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