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  1. Why doesn't last round of DES have swapping?

  2. Why MixColumn is not included in last round in AES?

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  • 1
    $\begingroup$ Your second question is answered here. $\endgroup$ – mikeazo Jan 4 '17 at 18:54
  • 1
    $\begingroup$ Your first question is answered here. $\endgroup$ – mikeazo Jan 4 '17 at 18:55

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