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Everything about Cyclometer
Cryptologic device
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 catalog the cycle structure of Enigma permutations, thereby facilitating the decryption of German Enigma ciphertext. Wikipedia →
🧭 Start here: a 6-step reading path
- Read the overview: CyclometerA 5-minute orientation
- Pick up a classic book: Discovery of an Universal Principle for Dividng the Circumference of the Circle, or Any Part of It, into a Given Number of Equal Parts by ... the CyclometerThe most-reprinted book on the subject
- Read the landmark paper: The Hilliard CyclometerCited 0 times
- Go sideways: Card catalog (cryptology)A closely related topic
- Go sideways: Grill (cryptology)A closely related topic
📖 Definitions
Noun A device that counts the revolutions of a bicycle wheel in order to indicate distance travelled.
Noun An instrument for measuring circular arcs.
Noun A machine used to decrypt Enigma machine ciphers.
🗂️ The subject at a glance
🏆 Landmark papers (most cited)
📚 Books worth reading
- 📕Discovery of an Universal Principle for Dividng the Circumference of the Circle, or Any Part of It, into a Given Number of Equal Parts by ... the CyclometerWilliam Adamson (of Chelsea ) · 2020
- 📕CyclometerJames, Peter · 1985
- 📕New Departure coaster brakes for bicycles, motorcyclesNew Departure Manufacturing Company · 1910
- 📕Premier bicyclesPremier Cycle Works · 1900
Ranked by number of editions on Open Library, a rough measure of how lasting a book is.
🔗 Related topics
- Card catalog (cryptology) The card catalog, or "catalog of characteristics," in cryptography, was a system designed by Polish Cipher Bureau mathematician-cryptologist Marian Rejewski…
- Grill (cryptology) The grill method (Polish: metoda rusztu), in cryptology, was a method used chiefly early on, before the advent of the cyclometer, by the mathematician-cryptolog…
- Clock (cryptography) In cryptography, the clock was a method devised by Polish mathematician-cryptologist Jerzy Różycki, at the Polish General Staff's Cipher Bureau, to facilitate…
- Marian Rejewski Marian Adam Rejewski (Polish: [ˈmarjan rɛˈjɛfskʲi] ; 16 August 1905 – 13 February 1980) was a Polish mathematician and cryptologist who in late 1932 reconstruct…
- Zygalski sheets The method of Zygalski sheets was a cryptologic technique used by the Polish Cipher Bureau before and during World War II, and during the war also by British…
- Cryptanalysis of the Enigma Cryptanalysis of the Enigma ciphering system enabled the western Allies in World War II to read substantial amounts of Morse-coded radio communications…
- Bomba (cryptography) The bomba, or bomba kryptologiczna (Polish for "bomb" or "cryptologic bomb"), was a special-purpose machine designed around October 1938 by Polish Cipher…
- Cipher Bureau (Poland) The Cipher Bureau (Polish: Biuro Szyfrów [ˈbʲurɔ ˈʂɨfruf] ) was the Second Department of Polish General Staff unit charged with SIGINT and both cryptography…