Question: Problem 4 (2 points). Assume the DES only has 3 rounds instead of 16 rounds. Please explain why a weak key in DES will cause

Problem 4 (2 points). Assume the DES only has 3 rounds

Problem 4 (2 points). Assume the DES only has 3 rounds instead of 16 rounds. Please explain why a weak key in DES will cause self-inverting (i.e., Enc (Ene(m)) = m, where k is a weak key) Problem 5 (1 point). Please generate the 16 subkeys of this key Ox011f011f010e010e (the 8 parity bits are included) by using DES subkey schedule algorithm and demonstrate that this key is a semi-weak key (i.e., there are only 2 different subkeys that can be generated by this key). Please represent the subkeys you generate in hexadecimal

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