Recall the linear cryptanalysis of TDES discussed in Section 6.4.6. Assume that equation (6.33) holds with probability (3/4)3« 0.42. Also assume that the key satisfies fco®fci = 0. Then if we conduct the attack using 100 known plaintexts, what are the expected counts for c\ θρι = 0 and c\ Θ pio = 1? Compare your answer with the empirical results presented in the text. Why do you think the theoretical and empirical results differ?
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