# Any historical accounts of cryptanalysis of Jefferson's wheel cipher?

David Kahn in his book "The Codebreakers" wrote about Jefferson's wheel cipher, saying that "To this day the Navy uses it" (the book was first published in 1967). Are there any historical accounts of successful cryptanalysis of that cipher?

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It intuitively seems easy to brute-force with a partially known plaintext. The chance that two disks will have the same distance from $C_i$ to $P_i$ is negligible. You then brute-force the possible outcomes and compare them against a dictionary. You've arrived at a small subset of possible plaintexts so you select the one that makes more sense. A second message coded with the same key will verify the results.