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Well, I guess Son of Sam has become quite an issue! But before we all run off to Walmart to buy some noisemakers, take a listen to the 93-tone orthogonal frequency division multiplexing (OFDM) recordings at the following link: http://rover.wiesbaden.netsurf.de/~signals/WAV/RUS-OFDM.HTML Do these sound familiar? OK. Buy some "noisemakers," a good microphone and a quality amplifier. Then watch some Walmart-type noisemaker sounds on an oscilloscope and spectrum display. You will see that such noises are not random at all--they, and their harmonics, are very predictable and identifiable. But the possibility of signatures like OFDM occurring randomly from noise is quite mathematically impossible--and this is the precise reason they are used. So perhaps Sam is just playing recordings of Russian digital code--or something like it? Perhaps...But perhaps not. Now for my theory: I know it's easy to see government (especially the FCC) as slow, lazy, dumb and ineffective. And generally I agree-since I worked in government for 30 years :-) But sometimes government can be quite efficient. And this is especially true in the radio signals area. In fact, almost all complex HF data techniques were developed as government or military projects. Governments (and their contractors) have some of the best and brightest engineers in their employ. And sure, governments have automated CODE3-type systems that monitor the airways, always looking for new transmission and encryption modes. But these guys and gals are not stupid. There are lots of ways to "sift" the airways, and I would not be surprised if government engineers monitored ham and SWL email lists just like this one. After all, there are a lot of free tips from smart people here! Now suppose you are a government contractor. You have developed a new HF transmission technique that must be validated. How can it be tested? Part of the test is exposing other people to the technique. Can it be decoded by the average techy? Can the data within messages be read by others? Has anyone succeeded in analyzing and cracking the technique? (If so, any of us on this email list surely would let the rest of the list know!) So you put some chocolate on your signal: A crazy Son of Sam message that gains notoriety for your test. All over the world, people are asking "What is this?" And you wait and monitor the email lists... Does this theory sound crazy? I would suggest it is no crazier than a pot-smoking nut who sits at his station twisting a four-way frequency switch, while playing various Walmart-provided buzzers and party favors! But who knows... Dave :-) -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 2/10/2005 ______________________________________________________________ Spooks mailing list Home: http://mailman.qth.net/mailman/listinfo/spooks Help: http://mailman.qth.net/faq.htm Post: mailto:[email protected] - Visit http://www.spynumbers.com/ for complete information about Spy Numbers Stations
