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  #1 (permalink)  
Old 01-10-2006, 12:12 AM
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Default Unscramble a scrambled transmission?

Can a scanner unscramble a scrambled transmission? If so, how?
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Old 01-10-2006, 12:32 AM
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I've never tried, but some have said it's been done.
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Old 01-10-2006, 12:36 AM
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I believe that there once was an AOR model that could utilize an optional module to unscramble simple speech inversion type of scrambling. It was never marketed (the module) to mainstream buyers in the United States.

Other than that one instance I can't think of any radio scanner that is designed so that it can unscramble a scrambled or encrypted signal. I would think that it would be very difficult to get FCC approval for a scanner that can do any type of descrambling since to do so is a violation of the law.
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Old 01-10-2006, 10:07 AM
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Oh ok. I heard of it being done. Thought I would ask. Thanks!
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Old 01-10-2006, 3:32 PM
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Not with a scanner alone, but with a computer and a 1/8" to 1/8" mono to mono cable..... I will leave the rest to interpretation.
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Old 01-10-2006, 3:53 PM
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there's a program somewhere online that will undo voice inversion.... i will try to find it.
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Old 01-10-2006, 6:02 PM
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There're 2 programs that I know of:
Voice Descrambler
&
Invert.exe
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Old 01-10-2006, 10:54 PM
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that second one is the one I was talking about... thanks!
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Old 01-12-2006, 12:47 AM
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Thanks for the downloads guys. I was looking along the lines of hooking something up to the scanner (mounted in the car).
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Old 01-12-2006, 2:26 AM
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look in the scannermaster store, i believe i saw one there that has the module for voice inversion.
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Old 01-12-2006, 2:50 AM
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we're walking on thin ice here... it won't be long before somone starts in on the legality of listening to scrambled radio transmissions
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Old 01-12-2006, 3:17 AM
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yes, but the question was "can a scanner decode a scrambled transmission".

not "i'd like to decode a scrambled transmission".

there was no intent shown, or implied.
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  #13 (permalink)  
Old 01-12-2006, 3:33 AM
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lol good point!
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Old 01-12-2006, 4:30 AM
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Once upon a time there was a contributing author who got his work on descrambling digital encryption via computer published in a major monitoring magazine. Just as he was about to publish the results of his findings and release a beta of the software the feds came down with a summons to appear in federal court in Brooklyn NY. This author happened to live in California so you can see where this is going. Skipping an intensely boring chapter of the story, toward the end he asked me for and got directions to Cadman Plaza from JFK Airport and was about to appear when he suddenly died of a heart attack. Ordinarily at this point I would crack a joke but since working together on this legal entanglement the respect I have for him prevents me from doing so.

The moral of the story is the age old military incentive, don't ask, don't tell. So, how many times do I have to tell you guys that covert operations should never be discussed openly? Not even a HINT? Not even a SUGGESTION? Yeah, here come the lame excuses but don't tell me, tell it to the judge.
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Old 01-12-2006, 6:31 PM
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Quote:
Originally Posted by kb2vxa
Just as he was about to publish the results of his findings and release a beta of the software the feds came down with a summons to appear in federal court in Brooklyn NY.
What was the specific charge(s) brought against him?
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Old 01-12-2006, 6:48 PM
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luckily, our good man here, is wondering about analog encryption.
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  #17 (permalink)  
Old 01-13-2006, 1:56 PM
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Quote:
Originally Posted by mkewman
look in the scannermaster store, i believe i saw one there that has the module for voice inversion.
I searched for Voice Inversion and came up empty there
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  #18 (permalink)  
Old 01-13-2006, 4:41 PM
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Cool

check out ctp descrambler, ramsey electronics.....
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Old 01-14-2006, 6:52 PM
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Default Unscrambling

Using a Icom R 75 I have monitored scrambled cordless phones, example phone on 46.710 descrambled by tuning to 46.713.5 lsb or tuning to 46.706.5 usb.
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Old 01-15-2006, 9:33 AM
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Yeah, and the Feds threaten ya with termination should you be unlucky enough to have worked with blue book technology and talk about it!
 

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