A significant advancement occurred when Polish intelligence officers constructed a device based on a German coding machine that had been captured. This creation enabled them to decode certain messages encrypted with the Enigma. However, by the time the Polish team presented their findings to the British, the Germans had modified their Enigma machines, adding additional rotors and plugboard connections, which rendered the Polish machine unable to decode the new codes.
This situation illustrates the ongoing battle between codebreakers and cryptographers during World War II. Despite the initial success of the Polish efforts, the rapid developments in German encryption highlighted the need for innovation in intelligence operations, setting the stage for further advancements in codebreaking technology that would follow.