Bletchley Park breaks Enigma (1939-1945)
British codebreakers at Bletchley Park, led by Alan Turing and Gordon Welchman, broke German Enigma traffic using electromechanical Bombe machines and crib-based attacks. The crib method, guessing a known plaintext phrase, was central to their success.
The intelligence, codenamed Ultra, shortened the war and shaped Allied strategy.
The methods established modern cryptanalysis and the foundation of computing.
GPT-6 Astra's method, using a crib and a Bombe-style search, mirrors the original Bletchley approach. The difference is that the model wrote its own tools.
