THIS compelling compilation of essays reveals how cryptologists at Bletchley Park broke some of the toughest Nazi codes using the world鈥檚 first valve-based computer. It is technical, not for the faint-hearted. What makes it worthwhile is the chance to read the words of unsung heroes like Tommy Flowers, the Post Office Research Station engineer whose team built Colossus, the computer designed to reveal the rotor settings on Germany鈥檚 highly effective Lorenz teletype encryption machines.
Colossus: The secrets of Bletchley Park鈥檚 codebreaking computers
Oxford University Press
