Phil Hayes

Colossus Rebuild Chief Engineer Phil Hayes will guide you through the workings of the first electronic computer that was used to crack Hitler's most secret messages.

* The Lorenz - what is it and how it works
* Lorenz message transmission and interception
* The first break - Col John Tiltman
* Unravelling the architecture of Lorenz - Bill Tutte and "the greatest intellectual feat of World War II"
* How some Lorenz messages were broken by hand in the Testery
* Tommy Flowers and constructing Colossus
* Bill Tutte's Double Delta statistical attack on the Lorenz cipher and what Colossus actually did
* Tony Sale and rebuilding Colossus
* Emerging research on other secret code-breaking machines at BP.

The evening will conclude with a glass of wine and demonstrations of Tunny, Heath Robinson (currently being reconstructed) and Colossus.