Question: 3. Suppose a user wants to decrypt an archived ciphertexts, C=E(kold,P), which was encrypted with DES. Show how the user can decrypt C using an

3. Suppose a user wants to decrypt an archived ciphertexts, C=E(kold,P),

3. Suppose a user wants to decrypt an archived ciphertexts, C=E(kold,P), which was encrypted with DES. Show how the user can decrypt C using an already installed Triple DES system. (10 points) Note: Triple DES decryption uses DES 3 times (D, E, \& D) 4. A new mode of operation for block cipher is

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