lawprojectfoundation

Well, like any camping trip to uncharted terrain, need to buy the right gear. Ordered a SDR Dongle that picks up P25 digital signals. Been doing a little research and found out that people are decoding satellite video signals with SDR. Is this a heads up that there might be a work around for this ? Sems that you can even get the rig to work with a RaspPI, so it doesn't look like hardware issue. Locating a signal strong enough looks like the first barrier, right across the the river to PA or up North, which might be an antenna challenge....On to DEFCON 2019 ?

Thanks for the additional feedback. I downloaded the files, and I'll see just what happens. This is basically one of those projects that you never really know just what you might discover after trying all the different approaches. This could just be a result that you never expected to get.

I'm looking at this from two seperate viewpoints: Is the Information: Voice transmission a separate entity, or a hybrid due the Encryption process ? If you can recover the initial content from the Encryption, what due you have ? There is a civil liberties issue for me dealing with transparency and accountability. Not sure if this part is relevant to this forum though .

Hey Folks: A lot of great feedback. I'll look into the GNU radio angle. SDR sounds like a better alternative than a P25 Scanner if you can get one... WHY do this ? Because I can....?

What if your NOT cracking the Encryption ? Is there a distinction ? It's still going over the air, subject to capture .....

Kent: Thanks for the feedback, it would seem that end to end encryption would be a major bear to get a handle on. What I was speculating on was the possibility of analyzing the wave form in that frequency with SDR then taking that output into something (Audacity)? that would show the waveform, IF THERE IS ANY after it's been scrambled. Now I know this is wishful thinking on my part, MAYBE DELUSIONAL, but I'm not that sure what encryption does to a sound file. It's not a major problem in my part of the state, S. Jersey, but up North it's SOP. This is a growing trend across the country, it has a lot of those who would monitor the traffic bummed out, and not doing it much anymore.....John

Not quite as into the dark side as most of the tribe, but here is my tale of woe: I was an avid ham and police scanner enthusiast . The Police Depart's have just about all gone over to the new 700 mhz AES encrypted truncated voice transmission. Anyone have any input on if it's possible to capture the transmission and try to pull some data out of the stream to reconstruct the voice pattern ?