Re: Why Doenitz did not understand that the allied had detected HF/DF and broken enigma codes?
I guess itīs better the Germans did not suspect a problem...
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Also from the same book:
" After the war, when teams of Allied investigators seized documents and interrogated German codemen, it was discovered that the nazis, if they had shown better foresight and less confidence in their cypher systems, could have rendered the Bombes useless. They had designs and prototypes for machines such as the "39" version of the Enigma that would have been as secure as Americaīs ECM encrypting machine, which used fifteen rotors as well as irregular rotor movements to baffle its enemies."
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