Cheers, sir !
: The Admiralty U boat Assessment Threat was
: produced using all available information,
: which of course included Special
: Intelligence. There were two simultaneous
: publications; one had a top secret clearence
: level and the other was above top secret.
: As the British could read the German Enigma
: codes they knew that the enemy could read
: the Top Secret version. This knowledge
: allowed the 'above top secret' version, one
: that contained information taken directly
: from Enigma codes messages and set to far
: fewer parties in the RN and USN. This above
: top secret assessment was sent out on typex
: machines, which the Germans were never able
: to read. The lower level publication was
: constructed in such a manner so as to fool
: the Germans into believing that the data
: came from a variety of sources, EXCEPT from
: the reading of the Enigma codes. It often
: contained false, ambiguous, slanted data,
: along with accurate stuff.
: The Germans relied on this version as
: absolute proof that their codes were not and
: COULD not be broken.
: This British counter intelligence programme
: ran successfully throughout the war, and
: ensured the Germans continuing to use
: Enigma, which the British happily continued
: to read.
: I have read a few 'same date' assessments,
: and when one lays them side by side, the
: differences make for interesting reading.
: There is enough material on this subject to
: produce a dozen PHDs. Good ones too.
: --Previous Message--
: Can you tell those of us who have never
: of those reports more about this topic.
: online resources or books on the subject.
: sounds interesting