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Compute the bits number 1, 16, 33 and 48 at the output of the first round of the DES decryption, assuming that the ciphertext block is composed of

Compute the bits number 1, 16, 33 and 48 at the output of the first round of the DES decryption, assuming that the ciphertext block is composed of all ones and the external key is composed of all ones.

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