Old school inversion de-scrambling device

[bharvey2]

I'm not sure why anyone would bother with voice inversion scrambling. It's the "Pig Latin" of any encryption scheme and I'd say that's a generous description. It doesn't fool anyone.

 

[DVINTHEHOUSEMAN]

Isn't Digital Voice Protection (DVP) and early form of encryption?

DVP/Vulcan was the first cipher available for Motorola's SECURENET voice encryption system, yes. It was fairly early on for non-military radio encryption.

 

[Razorback55]

I’m looking for an old school inversion scrambling decoder. I had one decade ago but I have a use for one now. They were even offered by kits in the late 70’s to mid 80’s. Any ideas? TY for the 411

there is a soft for windows :

Voice inversion Unscrambler : Scrambler : Free Download, Borrow, and Streaming : Internet Archive

This software allows you to find the voice inversion frequency of radio walkie-talkie scramblers. The first software (pukallvit) gives 2 frequencies, you...

archive.org

 

[kc2asb]

I'm not sure why anyone would bother with voice inversion scrambling. It's the "Pig Latin" of any encryption scheme and I'd say that's a generous description. It doesn't fool anyone.

It could thwart casual listeners from monitoring their communications. However, any one employing voice inversion scrambling most likely is not worth listening to in the first place.

 

[12dbsinad]

We used to use rolling code inversion back in the day. Little bit more of a PIA to decode but still voice inversion.

 

[merlin]

I have an Icom IC-F4GT with a scrambler module. Uses audio in-audio out and VCC, so would be simple to adapt to about anything.
IIR it has 6 codes, fixed or rolling.
I wouldn't recomend this for secure voice, too easy get around.
ICOM UT-110 Scrambler Unit

 

[merlin]

There used to be kits from Ramsey Electronics (?) and ready-built devices that you could buy to de-scramble voice inversion, but I believe they became illegal to manufacture and sell after the ECPA was passed into law. Check on Ebay - you might find one of those old de-scrambler kits or devices from back in the day.

Wasn't Digital Voice Protection (DVP) and early form of encryption?

These voice inversion encoder/decoder are analog, but you can find modules for digital using DES.

 

[merlin]

Yea, I have a Quansheng UV-K5 that does voice inversion.

 

[IC-R20]

These voice inversion encoder/decoder are analog, but you can find modules for digital using DES.

When you buy the AOR communications receivers overseas like the DV1 DV10, can also do it with RTL SDR as well. If it's just the 16 bit digital "scrambling".

 

[SABER3]

TY to everyone for the 411

 

[KK4JUG]

Yea, I have a Quansheng.......

Did the doctor give you a shot for that?

 

[bharvey2]

Did the doctor give you a shot for that?

Scotch or tequila if he's a sympathetic doctor.

 

[RayAir]

I’m looking for an old school inversion scrambling decoder. I had one decade ago but I have a use for one now. They were even offered by kits in the late 70’s to mid 80’s. Any ideas? TY for the 411

I put this together over the course of a couple months when I was feeling old school. I didn't set it up for real time descrambling, just for wav files. It is more of an educational tool. However, it can scramble and descramble in the following modes:
-Fixed inversion 18 selectable keys
-Split-band inversion 32 selectable keys
-Pseudorandom hopping inversion:
Slow hopping (one hop per second, equivalent to Transcrypt SC20-410)
Normal hopping (6-12 hops/sec, similar to Midian TVS-2)
Fast hopping (16-25 hops/sec)
Hopping modes are controlled by a PRNG and require a 32-bit user entered hex key. Hop mode and key must match to descramble.

 

[Ensnared]

Even though the ECPA made these voice inversion de-scramblers illegal, anyone that owns and uses one has little chance of getting caught. It's much like listening to analog cellphones back in the day, which was also illegal under the ECPA. It's practically unenforceable

It reminds me of going into a cannabis dispensary in Texas. If you buy glass pipes, they are not illegal until illicit behavior occurs, LOL.

 

[Ensnared]

Google AI says 1996 instead of the ECPA date --as usual AI is wrong. If you slightly reword the question, it will tell you that it is not illegal--again AI is wrong. Hard to get AI to give you a right answer to almost anything. Now the easy way is to download the software for a PC that will de-scramble the audio.

Here is a related interesting old document. https://www.govinfo.gov/content/pkg...VPUB-C13-38e6dc21a1cc9e76d55d0dd8391a8559.pdf

I've never thought of this. When AI grows more advanced, we might ask it to figure out the key.

I enjoy jacking with AI because this service is completely lost when it comes to psychiatric diagnostics.

I wonder how AI will be used for illegal purposes in places like Las Vegas?

 

[kc2asb]

I've never thought of this. When AI grows more advanced, we might ask it to figure out the key.

I enjoy jacking with AI because this service is completely lost when it comes to psychiatric diagnostics.

I wonder how AI will be used for illegal purposes in places like Las Vegas?

LOL Never thought of that before, but it would be an original approach for sure. Of course, an advanced AI could just be used to create a more secure key.

Humanity probably is planting the seeds of its own demise with AI. Right now, it's a novelty, but it won't remain that way for long. But, as long as it does not get incorporated into the next generation scanners, it's fine.

 

[KK4JUG]

Humanity probably is planting the seeds of its own demise with AI. Right now, it's a novelty, but it won't remain that way for long. But, as long as it does not get incorporated into the next generation scanners, it's fine.

Echos of Hal in 2001: A Space Odyssey.

 

[merlin]

better off safe than in jail...
gotta ask yourself one question, is it worth it ?

You gotta get caught first.

 

[merlin]

These old analog methods to scramble voice are crude at best. they can make the casual scanner hard to understand what is said, but those methods are easy to circumvent.
I have an Icom F4 with scrambler, any of the 6 codes just makes voice sound garbled.
There was an old kit that could unscramble a couple of these methods, usually just breaking speach band into a few segments then re arraning the segments.
Digital voice, well, that is another story.

 

[kc2asb]

There was an old kit that could unscramble a couple of these methods, usually just breaking speach band into a few segments then re arraning the segments.
Digital voice, well, that is another story.

I think Ramsey made those kits, which could also be purchased wired and in case.