Joel McNamara first told me about NONSTOP and its commonly associated classified codeword, HIJACK, both somehow related to Tempest. When you do a search on either of them you get hundreds (or 1000s) of hits for the generic terms "non-stop" and "hi-jack" but few entries for the codewords, and then as standards in military security documents. It's as if the codewords were picked to be camouflaged by the generics. And, because codewords are usually set to have no relation to the protected material, they probably are not descriptive -- but could be, just to outfox off the smarties. The NONSTOP doc released to us was first issued in 1975 and has gone through 4 reprintings, the latest in 1987. And it continues to be cited as still in effect, though usually such standards are updated at least every 5 years. So there may be a later one which would account for the partial release after first denial. It's intriguing to read Spycatcher (1987) while reading the Tempest docs. I had not read Wright's most informative book, and regret not having done so. For those who have not read it, Peter Wright was MI5's first scientist, and entered the service after WW2. He specialized in the technology of counterintelligence and with a few others cooked up a host of ingenious means to spy on spies and suspects. A specialty was the extraordinary use of electromagnetic devices -- radio, telephone, acoustic, resonance, and more -- applying scientific abilities well in advance of technicians and engineers. Some of his ideas were so advanced his bosses said impossible, until he proved effectiveness. Then Wright quickly became the savior of bureaucrats who could not understand why Britain's enemies kept outsmarting them -- usually with advanced technological means. Wright changed that, but often got at odds with non-scientifically trained personnel. Among others, he worked closely with GCHQ on occasion to provide technical attacks on cryptosystems which could not be broken by cryptanalysis. Thus his research on the cryptosecrets revealed by compromising emanations from devices, cabling, furniture, construction materials, and a host of ordinary physical objects -- all of which emitted signals that could be acquired and interpreted by careful tuning for comprehension. He writes of amazing methods of acquiring signals, and it is no wonder HMG fought to prevent publication of Spycatcher. What he did not write about must be even more wondrous, and it makes you think he could pick up your brain waves if you were part of particular triangulated antenna. Maybe NONSTOP and HIJACK have nothing to do with the stuff Wright excelled at. Still, reading Spycatcher along with the Tempest docs -- and now Stephen Budiansky's "Battle of Wits: The Complete Story of Codebreaking in World War II," (2000) -- certainly demonstrates how much of codebreaking has been done by covert technical and physical means, even as we are told misleading cover stories. Are the crypto-revelations also disinformation? Historically all have been. Ha, ha, ha.