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3. [15pts] Is the following statement True or False: 3-DES, which uses three (single) DES encryption operations in series and three independent keys-C = Enc(K3.

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3. [15pts] Is the following statement True or False: 3-DES, which uses three (single) DES encryption operations in series and three independent keys-C = Enc(K3. Enc(K2, Enc(KI, P)))-has an effective keyspace size of 2168 under the known-plaintext attack"? Argue your answer in details

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