60 year old
As seen in Wallace & Gromit
and run with RealPlayer
warning! you do need a good broadband connection to see these!
Colossus goes Authentic!!
Recoating of relay covers grey generously supplied by
RSCOATINGS of Fenny Stratford, Milton Keynes
Now working on Colossus cipher pattern extraction ready for another
Cipher Challenge later in the Year
Valves for Colossus:
EF36, EF37, EF37A, 6J5, 6V6, 6K8, 807, GT1C
The Baudot teleprinter code table
Codes and Ciphers The history, science and engineering of cryptanalysis in World War II created by Tony Sale
Second World War
Between 1939 and 1945, the most advanced and creative forms of mathematical
and technological knowledge were combined to master German
British cryptanalysts, Alan Turing at the forefront,
changed the course of the Second World War and created the foundation for
the modern computer.
In 1991 the Bletchley Park, the wartime home of Allied code breaking, was saved
from destruction by Tony Sale and some colleagues. They transformed it into a museum devoted to
the recognition and reconstruction of this crucial aspect of world history,
which had remained completely secret until the early 1970s.
and Lorenz too!!!
this is for the Nerds
Scenario 6 now up!|
is based on Robert Harris's novel Enigma. Although
essentially fiction, it contains detailed sequences of Enigma
codebreaking which have been scrupulously reconstructed by Tony Sale.
Go to these pages by Tony Sale for full details.
An interactive exploration of Bletchley Park and World War II code breaking from 1938 to the present day.|
Status Log . Not perfect but ready by Friday.
Lectures by Tony Sale
Lecture Notes on the Enigma and the Bombe, on Naval Enigma and on the Colossus are available.
Fish Notes by Captain Walter Fried describing in great detail the
work of the Newmanry and Testery in Bletchley Park on breaking the Fish
codes, Tunny (Lorenz) and attempting to break Sturgeon (Siemans).
Continue to Fish Notes.
Annex to Fish Note #F 071 giving a detailed account of breaking
Lorenz from Delta D and lists the Colossus runs used.
Continue to Delta D and Colossus runs.
Critical Observations on German Traffic Analysis in Sixta
Part of the History of Sixta written by Robert G. Nunn Jr. at the
end of the war. Continue to
Observations on Sixta.
The History of the American 6813th Detachment
Written by members of the American 6813th Signal Security
Detachment seconded to Bletchley Park from August 1943. Continue to
Introduction to the 6813th History.
The Report on the British Bombe
Written by members of the United
States 6812th Division who were seconded to the Bombe outstation at
Eastcote in North London in 1944. Continue to
Introduction to the US 6812 Bombe Report.
Tentative List of Enigma and Other Machine Usages
A report written in Bletchley Park in 1945. Continue to
The German manual for the naval use of the Enigma (1940)
This document, the Enigma General Procedure, was captured and translated by the British. It can now be read on this site. Continue to the Index page to the Enigma General Procedure.
The German manual for the doubly enciphered Naval Enigma messages (1940) This is the protocol for the offizierte messages which were doubly enciphered for officer's eyes only. It was also captured and translated by the British. Continue to the Index page to the Offizier and Staff Procedure.
The Bletchley Park Cryptographic Dictionary (1944)This document listed and defined the hundreds of specialist concepts and activities at Bletchley Park.
Continue to the Introduction to the Dictionary.
The Newmanry History (1945) This document, kept secret until 2000, is the most crucial part of a longer General Report on Tunny. It gives the complete story of how the Lorenz cipher was broken, from the amazing breakthrough of 30 August 1941 up to the extremely sophisticated programming of the Colossus. Continue to The Newmanry History.
The Special Report on Fish (1944) This document gives a complementary account of the breaking of the Lorenz ciphers through the use of Colossus, as reported at the time by an American cryptanalyst attached to Bletchley Park. Continue to The Special Report on Fish.
You may also wish to visit:
Alan Turing Home Page
Frode Weierud's Cryptology pages
David Hamer's Enigma pages
Bletchley Park Trust
Graham Ellsbury's essays on Enigma and the Bombe
Aileen Leblanc and Debbie Anderson's story of the Dayton Codebreakers