Back آلة دوارة Arabic ঘূর্ণক গুপ্তলিখন যন্ত্র Bengali/Bangla Màquina de rotors Catalan Rotor-Chiffriermaschine German Máquina de rotores Spanish دستگاه گردان Persian Rotormachine Dutch Rotor makinesi Turkish 轉子機械 Chinese
 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (March 2009) |
In cryptography, a rotor machine is an electro-mechanical stream cipher device used for encrypting and decrypting messages. Rotor machines were the cryptographic state-of-the-art for much of the 20th century; they were in widespread use in the 1920s–1970s. The most famous example is the German Enigma machine, the output of which was deciphered by the Allies during World War II, producing intelligence code-named Ultra.