Question: In practice the short exponents e = 3, 17 and 216 + 1 are widely used. 1. Why cant we use these three short exponents

In practice the short exponents e = 3, 17 and 216 + 1 are widely used. 1. Why cant we use these three short exponents as values for the exponent d in applications where we want to accelerate decryption? 2. Suggest a minimum bit length for the exponent d and explain your answer.

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