- You're a genius, Laila!
She bent over his shoulder, trying to make out what he scribbled.
- No, Lyle, you guessed it. You were right - this is not the substitution cipher. Actually, not only him. Unknown cryptographer used both permutation and substitution. This combination greatly complicates the interpretation. Especially if the original text in medieval Latin, I suppose.
Roberts, without interruption, scribbling on the paper as he spoke. When finished, he leaned back and showed the decrypted text.
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