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Cyclometer
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The cyclometer was a cryptologic device designed, "probably in 1934 or 1935," by Marian Rejewski of the Polish Cipher Bureau's German section, to catalog the cycle structure of Enigma permutations, th
Cyclometer, devised in the mid-1930s by Rejewski to catalog the cycle structure of Enigma permutations. At top are the two rotor banks, one with lid o
Cyclometer, devised in the mid-1930s by Rejewski to catalog the cycle structure of Enigma permutations. At top are the two rotor banks, one with lid open; below is the rheostat at left, and at right the array of lamps and switches labelled with corresponding letters.
Enigma, an electro-mechanical rotor machine with scrambler comprising entry drum, three rotors, and reflector. This military model also has a plugboar
Enigma, an electro-mechanical rotor machine with scrambler comprising entry drum, three rotors, and reflector. This military model also has a plugboard.
Marian Rejewski, ca. 1932
Marian Rejewski, ca. 1932