Cipher wheels are a well-known method of cryptography. Their embodiments range from the Jefferson wheel, invented by the American President Thomas Jefferson, to the Enigma machine, whose solution was critical to the course of World War II. Not surprisingly, cipher wheels are related to several basic topics in wordplay. These topics include non-crashing word sets, shiftwords, collinear words, halfway words and reflectors.
"Cipher Wheels for Cheerfuller Hallmarking,"
Word Ways: Vol. 44
, Article 21.
Available at: http://digitalcommons.butler.edu/wordways/vol44/iss1/21