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El Gamal encryption question

  1. Mar 22, 2009 #1
    1. The problem statement, all variables and given/known data

    Suppose someone uses ElGamal to encrypt a message. You know
    that the public key is p = 29, g = 18, and a = 14. The message was translated
    from letters into numbers by the system A $ 2, B $ 3, ..., Z $ 27. If the
    encrypted message was
    M1 = 17 M2 = 14; 11; 9; 24; 23; 24; 11;
    then what was the original message?


    2. Relevant equations

    N/a (please read below)

    3. The attempt at a solution

    I understand how to do this question actually if I was given the unknown k value. Does this question expect us to break the code and find the unknown k value...? Because this could take a very long time considering that's what the encryption methods are designed to do...
     
  2. jcsd
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