Using Colossus with Russian teleprinter traffic

The National Museum of Computing (TNMOC) is home to the world's largest collection of working historic computers.Follow the development of computing: from the Turing-Welchman Bombe and Colossus of the 1940s through the large systems and mainframes of the 1950s, 60s and 70s, to the rise of personal computing and the rise of mobile computing and the internet.Recognised as one of England’s top 100 ‘irreplaceable places’, we welcome corporate and group visits, schools and individuals from all over the world.We are normally open Tuesday to Friday 10:30 -17:00, Saturday & Sunday 10:30 – 17:00. Please check tickets for actual opening days and times.TNMOC operates independently of Bletchley Park Trust, although we are located on the Bletchley Park Estate.To visit us, go through the main Bletchley Park entrance, through the barrier, walk or drive bearing left beyond the main car parks, to our separate entrance located at the top of the Park.Visit their website here for more information.https://www.tnmoc.org/Sat Nav users: please use the postcode for the railway station MK3 6DS on Sherwood Drive and then follow signs. The postcode for Bletchley Park will actually take you to an old entrance which is closed.

tnmoc

Colossus machines were sent to GCHQ to work on Russian teleprinter messages

This lecture will be delivered by TNMoC Volunteers Jerry McCarthy &amp; Peter HoathIntroductionPeter will give an introduction to the Lorenz SZ40/42 machine and the principles behind Bill Tutte’s 1 + 2 attack, linking it to the linguistic structure of the German language and how it interacts with the 5 unit teleprinter code. Peter will then explain the basics of the Tutte algorithm which allows crucial machine settings to be derived simply from a long enough encrypted message.The 'Colossus' machineJerry will explain the motivation behind the creation of the machine "Colossus" and its link to the Lorenz SZ40/SZ42 machine. He will also explore the various stories concerning the fate of the Colossi at the end of WWII, including the possiblity that two Colossi were sent to GCHQ to help with breaking Russian teleprinter traffic encrypted with captured SZ4n machines.

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Using Colossus with Russian teleprinter traffic

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Using Colossus with Russian teleprinter traffic

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