As can be seen, Bob could not reconstruct the cleartext in the first 7,000 steps, but then he improved. After about 14,000 steps he had learned how to decrypt Alices message without making any mistakes. On the other hand, Eve could never do better than getting five wrong bits. After 15.000 steps her rate remained steadily at eight guessed bits, which is a 50 percent rate.
Of course, it would be interesting to look at the encryption algorithms Alice and Bob produced in these experiments. However, examining these algorithms was out of the scope of this work. Maybe, this can be done in a future examination.
Further reading: An extraordinary encrypted book: George Orwell’s “1984” enciphered in color
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