Code- and cipher-breaking have been in operation for centuries. However, cryptanalysis – the art of deciphering encoded messages – took on a new importance.

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Presentation transcript:

Code- and cipher-breaking have been in operation for centuries. However, cryptanalysis – the art of deciphering encoded messages – took on a new importance during WW2 as British boffins strived to reveal the true meaning of encrypted German military messages. It is believed that code breaking at Bletchley Park helped to end the war at least 2 years earlier than it would have ended. This saved many thousands of lives.

Photo: Hut 3 at Bletchley Park, Buckinghamshire in Here, civilian and service personnel worked together at code-breaking top-secret military communiques between Hitler and his armed forces

Can you solve my decimal code? You will need to work as a team in your tutor group as you do not have time to answer every question. Decide who will calculate which letter and get cracking…….

0.4 x 10 = A 0.35 x 100 = D x 1000 = X x 1000 = E 0.2 x 10 = B 0.72 x 100 = F x 1000 = H 0.8 x 10 = K 0.66 x 100 = L x 1000 = W 0.31 x N = x P = x 100 = O x R = x 100 = S x 1000 = T 0.7 x 10 = U 0.86 x 100 = Y 0.01 x 100 = C

Answer on next slide

BLETCHLEYPARK WASKEPT SECRET FORTHREE DECADES