Scanner that can descramble encrypted speech

[newgen2005]

Scanner that can descramble inverted speech

Does anyone know if any scanners can do this? A mate has a Yupiteru 7300 and he thinks it does this out the box!!!

 

[fineshot1]

Does anyone know if any scanners can do this? A mate has a Yupiteru 7300 and he thinks it does this out the box!!!

No - no such thing. What would be the point of having encryption if a scanner could decode it?

 

[newgen2005]

Sorry I meant inverted speech not encrypted

 

[fineshot1]

Sorry I meant inverted speech not encrypted

Ok - well that is a different story. I do not think there are any scanners/receivers that
do it out of the box(correct me if i am wrong please) but I know it can be done with
an add on mod pc board but its been too long for me to recall the details.

 

[iMONITOR]

Does anyone know if any scanners can do this? A mate has a Yupiteru 7300 and he thinks it does this out the box!!!

The AOR AR8200 Mk IIIB, and AR8600 MkIIB have an optional VI8200 Voice Inversion Slot Card. Analog 157 step, available. It is restricted in the U.S. to qualified Government/agencies, and export.

I wouldn't spend any time or money attempting to purchase one, as voice inversion is not in wide use, and not used at all where secure communications really matter. In addition, there are several types of voice inversion, and AOR's might not even be compatible with what you're attempting to monitor.

 

[CWR]

Yeah , the Yupiteru-7300 does inverted speech . Read page 37 of the owners manual........

 

[wannabescannist]

Various scanners/receivers can do basic speech inversion. All you have to do is select the correct (or very close to correct) inversion point (aka frequency). Not many do because of legal reasons based on country though. For example, the Alinco DJ-X7E has that feature (note the "E" which means it's the European version).

 

[rankin39]

I built one back about 1970. It's just a balanced modulator (4 cheap diodes and a stage of amplification). You mix the received audio with a tone (usually between 3000 and 3500 Hz.) in the modulator and, presto. Popular Electronics magazine in about '69 or '70 published a design for a "telephone" scrambler that served the purpose. I used that schematic.

You can also convert the vhf signal down through a communications receiver and then tune it in the USB mode. It's just "sideband" at audio frequencies. Won't work with more sophisticated encryption, of course.

Bob, WoNXN

 

[denseglow]

what would be the point of having a scanner that could "descramble" encyrpted comms? Wouldnt that defeat the purpose of making them secure in the first place? Think before you post people.

 

[rdale]

what would be the point of having a scanner that could "descramble" encyrpted comms? Wouldnt that defeat the purpose of making them secure in the first place? Think before you post people.

A day late and...

No - no such thing. What would be the point of having encryption if a scanner could decode it?

 

[freqhunter]

I guess the usefulness of it would be regional. There used to be many departments in Northern Ohio that used inversion. One East side department still does. I am not sure why routine comms need to be hidden from the public. I see a need for it when running special ops though. ODNR for instance loves to run encryption on MARCS with Parks and Rec Maintenance. I guess it is a matter of national security to keep the camp sites safe and heads filled with TP! I don’t really care to hear that inversion and encryption are different animals. At the end of the day the purpose is to mask comms.

I would not want to jeopardize my amateur or GMRS license to fool with it. Let alone the jail time and expense of fighting the Fed.

 

[fez_uk]

Inverted scrambling is a type of encryption although not a very secure type.

By the way he lives in the UK.

 

[pyeman99]

Inverted scrambling is a type of encryption although not a very secure type.

By the way he lives in the UK.

Try this http://www.verhees.nu/Downloads.htm look for voiceinvert 2

just take the audio out of the radio into the sound card mic or line input

 

[newgen2005]

Try this http://www.verhees.nu/Downloads.htm look for voiceinvert 2

just take the audio out of the radio into the sound card mic or line input

Thanks for the link, haven't tried voiceinvert 2 yet, have tried the other 2 though mentioned, they worked but not that great!! hopefully this one will work better.

 

[crissy]

re: voice inversion

The AOR AR8200 Mk IIIB, and AR8600 MkIIB have an optional VI8200 Voice Inversion Slot Card. Analog 157 step, available. It is restricted in the U.S. to qualified Government/agencies, and export.

I wouldn't spend any time or money attempting to purchase one, as voice inversion is not in wide use, and not used at all where secure communications really matter. In addition, there are several types of voice inversion, and AOR's might not even be compatible with what you're attempting to monitor.

The Yupiteru MVT-3300EU has a descrambler button but discontinued & hard to find. Priced at about $100. used.