cyclometer - définition. Qu'est-ce que cyclometer
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Qu'est-ce (qui) est cyclometer - définition

CRYPTOLOGIC DEVICE
  • Enigma]] [[permutation]]s. 1: Rotor lid closed, 2: Rotor lid open, 3: Rheostat, 4: Glowlamps, 5: Switches, 6: Letters.
  • Reconstruction of appearance of cyclometer, based on sketches in [[Marian Rejewski]]'s memoirs
  • [[Enigma machine]] – an electro-mechanical [[rotor machine]] with scrambler comprising (right to left) entry drum, three rotors, reflector. A modified version was adopted later in 1920s by German military.
  • [[Marian Rejewski]], ca. 1932

cyclometer         
[s??'kl?m?t?]
¦ noun
1. an instrument for measuring circular arcs.
2. an instrument attached to a bicycle for measuring distance.
Cyclometer         
·noun A contrivance for recording the revolutions of a wheel, as of a bicycle.
Cyclometer         
The cyclometer was a cryptologic device designed, "probably in 1934 or 1935," by Marian Rejewski of the Polish Cipher Bureau's German section (BS-4) to facilitate decryption of German Enigma ciphertext.Marian Rejewski, "Summary of Our Methods for Reconstructing ENIGMA and Reconstructing Daily Keys...

Wikipédia

Cyclometer

The cyclometer was a cryptologic device designed, "probably in 1934 or 1935," by Marian Rejewski of the Polish Cipher Bureau's German section (BS-4) to facilitate decryption of German Enigma ciphertext. The original machines are believed to have been destroyed shortly before the German invasion of Poland that launched the Second World War, to prevent the Germans learning that their cipher had been broken.

Using drawings made by Rejewski, Hal Evans and Tim Flack at the Department of Engineering, University of Cambridge, in 2019 constructed a working version of the cyclometer.