Talk:ULTRA

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Changing meaning

I don't have the references right here at hand, but my recollection is that the meaning of "Ultra" changed over time. It initially referred to just the Enigma system(s) (both Army, GAF and Navy), but eventually came to cover all high-level cryptanalytic intel. I think the same was true of the US term MAGIC, which came to cover all HLCI. If I have time, I'll try and research this issue further. J. Noel Chiappa 20:05, 24 October 2008 (UTC)

While I don't have the references at hand, I did once spend some research time with the original documents. There were a variety of names, both internal to the COMINT community and outside it. At Churchill's level, the material usually was code-worded BONIFACE or BLACK JUMBO, and even among the very few nontechnical people that saw it, the conscious impression was given that it came from a human source. When the SLU system started distributing it to senior commanders, they had a need to know that it was COMINT. Some SLU-related material suggests there may have been specific distribution lists, which the U.S. now calls BIGOT lists, but there was no special marking that differentiated the Mediterranean BIGOT list from the Channel list.

Eventually, there were three levels of British COMINT: ULTRA RABID, ULTRA DEXTER and ULTRA...ummm...I'lll think of it. It's in Kahn's Codebreakers in the other room. The lowest level was mostly non-cryptanalytic: traffic analysis, especially sensitive direction finding, and what we'd now call a radiofrequency MASINT technique of using recorders and time-domain oscilloscopes to recognize individual variations in Morse keying. Of course, an experienced operator could hear those variationsm, but that takes years to train. There were other markings for tactical direction finding.

I never saw a MAGIC document with any supplemental codewords. In Dan Gallery's book on the capture of the U-505, he talked about a "special TOP SECRET marking", but I went through the logs of his task group at the Naval Operational Archives, and they were just TS, not even MAGIC.

There was a little-known U.S. organization called Joint Security Control (JSC), which was acknowledged to be the steward of agreements on markings. For example, there was a Joint Security Classification Agreement in 1942, in which the British agreed to change from MOST SECRET to TOP SECRET. BIGOT was also established as a code word for TORCH.

What did not come out until the late seventies was that JSC was the U.S. counterpart to the utterly black London Controlling Section (LCS), the strategic deception organization that ran what was first Plan JAEL, and then OPERATION BODYGUARD (Churchill: "In wartime, truth is so precious that she must be protected by a bodyguard of lies.")

I am not clear if the Double-Cross system had any special markings; I've never seen originals of their documents. Howard C. Berkowitz 20:40, 24 October 2008 (UTC)