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  3. 3 playfair cipher suppose we want to use playfair cipher...

Question: 3 playfair cipher suppose we want to use playfair cipher...

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3. Playfair cipher Suppose we want to use Playfair cipher to communicate. (a.) (2 points) How many possible keys are there for the Playfair cipher? (b.) (3 points) Construct the Playfair square with the keyword IRENEADLER. (c.) (5 points) Use your answer in part (b) to decrypt the following message EUFN ICRF RAFK KRGN RU Remember to comment on whether we need to remove any pad at the end of the decrypted message

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