Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Chemistry
Biology and Medical
Earth Sciences
Computer Science
Computing and Technology
DIY Projects
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Chemistry
Biology and Medical
Earth Sciences
Computer Science
Computing and Technology
DIY Projects
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Other Sciences
Computing and Technology
A historical look at decrypting the Enigma
Reply to thread
Message
[QUOTE="Baluncore, post: 6815524, member: 447632"] One problem with using electronics to emulate electromechanical rotor machines was the complexity of an electronic crossbar switch, capable of cyclically indexing an array of scrambled connections. That structure requires two electronic barrel rotators connected by the rotor internal wiring. The circuit would need to be duplicated, because the current passed through each rotor twice, in different directions. Vacuum tube electronics could not then run forwards and backwards at the same time. It could be done in the 1960s using FET analogue gates, or diode bridge sampler circuits. It is usually done by indexing an array in RAM with a counter. Stephen Budiansky; Battle of Wits. The Complete Story of Codebreaking in World War II; Free Press (2000) Reports OP-20-G evaluating electronic Bombes in 1942. “The U.S. Navy's all-electronic design would avoid all of these mechanical and electrical problems by using twenty thousand vacuum tubes in place of the rotating wheels and relays. But no one had ever tried anything like that before, and it was not even clear that so many tubes could be purchased or that a power supply could be built to handle such a huge load, so the Navy quickly shelved that plan and decided to blend the best of the two British designs, combining a complete four-wheel bombe with an electronic sensing device.” [/QUOTE]
Insert quotes…
Post reply
Forums
Other Sciences
Computing and Technology
A historical look at decrypting the Enigma
Back
Top