[SIGCIS-Members] Fwd: From Encrypt to Decrypt -- Lorenz completes the story at TNMOC

Brian Randell brian.randell at newcastle.ac.uk
Thu Apr 7 03:08:21 PDT 2016


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The full story of the pinnacle of Bletchley Park code-breaking from encrypt to decrypt

1940’s cutting edge crypto technology revealed at The National Museum of Computing

7 April 2016

The pinnacle of code-breaking at Bletchley Park can now be told in its entirety from encrypt to decrypt using the full set of 1940’s cutting edge technology following the presentation today of an extremely rare Lorenz SZ42, Hitler’s “unbreakable” cipher machine, for display at The National Museum of Computing.

The breaking of the top-secret Lorenz messages of German High Command is credited with shortening the war and saving countless lives. Much more complex than Enigma, the Lorenz cipher could be broken only thanks to Bill Tutte’s deduction of the architecture of a Lorenz machine without ever having seen it. As a result, the Allies were routinely able to read German High Command’s top secret messages. From 1944, with the creation of the Colossus computer by Tommy Flowers, the Allies were able to reduce the decrypt time from weeks to hours, a speed that effectively undermined the German military machine.

At a ceremony in central London, Lieutenant Colonel Stein Wilhelm Aasland of the Norwegian Armed Forces Museum presented a Lorenz SZ42 as a long-term loan to Andy Clark, Chairman of TNMOC. The audience included two Wrens who had worked on Colossus along with relatives of those involved in the breaking of Lorenz.

Full story with photos here: http://www.tnmoc.org/news/news-releases/encrypt-decrypt-full-lorenz-story


Brian Randell

School of Computing Science, Newcastle University, Newcastle upon Tyne,
EMAIL = Brian.Randell at ncl.ac.uk<mailto:Brian.Randell at ncl.ac.uk>   PHONE = +44 191 208 7923
FAX = +44 191 208 8232  URL = http://www.cs.ncl.ac.uk/people/brian.randell

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