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Title: Rotor Machines

Essay Details

Subject: Technology
Author: Esther B
Date: August 2, 2013
Level: University
Grade: A
Length: 8 / 2360
No of views: 0
Essay rating: good 0, average 0, bad 0 (total score: 0)

Essay text:

Rotor machines were the cryptographic state-of-the-art for a brief but prominent period of history; they were in widespread use in the 1930s–1950s. The most famous example is the Enigma machine. The primary component is a set of rotors, also termed wheels or drums, which are rotating disks with an array of electrical contacts on either side...

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The wiring between the contacts implements a fixed substitution of letters, scrambling them in some complex fashion. On its own, this would offer little security; however, after encrypting each letter, the rotors advance positions, changing the substitution. By this means, a rotor machine produces a complex polyalphabetic substitution cipher...

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