Question: Explain why the one-time pad, if used correctly, is not susceptible to a brute-force attack. Say you obtain a ciphertext of an English sentence encrypted

  1. Explain why the one-time pad, if used correctly, is not susceptible to a brute-force attack.
  2. Say you obtain a ciphertext of an English sentence encrypted with an unknown key using this scheme. For a brute-force attack, what is the maximum number of keys would you have to test? Remember, a key is a set of four digits with values 0-9 in this scheme.

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