Listen to encrypted P25 with SDR

[Cerrazul27]

Hello, good evening.
I've been wondering for a few days whether I can listen to encrypted P25 transmissions with my SDR. I've searched for frequencies, and they all say they're encrypted. Is there a solution?

Regards

 

[RaleighGuy]

Hello, good evening.
I've been wondering for a few days whether I can listen to ADP-encrypted P25 transmissions with my SDR. I've searched for frequencies, and they all say they're encrypted. Is there a solution?

Regards

NOPE!

 

[kc2asb]

Echoing above, not possible or legal for that matter.

 

[mmckenna]

Hello, good evening.
I've been wondering for a few days whether I can listen to ADP-encrypted P25 transmissions with my SDR. I've searched for frequencies, and they all say they're encrypted. Is there a solution?

Regards

That is the entire point of encryption.

To listen in, you need a radio that will support ADP/ARC4 encryption, and you need to have the encryption keys. Without the encryption keys, you can't listen in.

ADP/ARC4 isn't real high spec encryption, and technically can be broken, but you need time, computing power and skills. Plus, as stated, it is illegal in many countries to try to hack encryption.

 

[KevinC]

Hello, good evening.
I've been wondering for a few days whether I can listen to encrypted P25 transmissions with my SDR. I've searched for frequencies, and they all say they're encrypted. Is there a solution?

Regards

Get a job with the agency?

 

[lwvmobile]

Yes.

 

[KevinC]

Yes.

If you know the key variable.

 

[ofd8001]

Splitting hairs a little. Yes you can "listen" to the encrypted transmissions. All you "hear" is something that doesn't make "sense". To decode them into something intelligible, you need all the stuff mentioned above, especially the encryption key, which probably won't be made available.

 

[kc2asb]

Hello, good evening.
I've been wondering for a few days whether I can listen to encrypted P25 transmissions with my SDR. I've searched for frequencies, and they all say they're encrypted. Is there a solution?

Solutions:
1. Convince the encrypted agencies you want listen to that you have a valid need to listen to their comms, buy the appropriate radio, and have them program for it you.
2. Find unencrypted frequencies to listen to. You didn't mention where you are located, but there must be comms that are in the clear. Check the Radio Reference database. As my local and surrounding departments have gone or are going encrypted, I have found other things to listen to. Aircraft, marine, ham radio. My scanning interests were never solely focused on public safety anyway.

Good luck.

 

[Project25_MASTR]

That is the entire point of encryption.

To listen in, you need a radio that will support ADP/ARC4 encryption, and you need to have the encryption keys. Without the encryption keys, you can't listen in.

ADP/ARC4 isn't real high spec encryption, and technically can be broken, but you need time, computing power and skills. Plus, as stated, it is illegal in many countries to try to hack encryption.

I believe the Boatbod version of OP25 now supports ADP/ARC4.

 

[lenk911]

I've searched for frequencies, and they all say they're encrypted. Is there a solution?

in 1939, it took the Polish Army about one week to decrypt a German army 4 rotor Enigma machine message with a pencil and paper. The Brits wanted it sooner and built the first computer. A 4 rotor Enigma machine is many orders of magnitude less complex than what is used today on a two way radio system. But, in reality, all you still need is a pencil and paper and lots and lots and lots of time. When successful you'll know where the police stopped for a donut break a few years (decades) back. Then you are ready to start working on the next message--probably about some stray dog! May cause problems with the wife but otherwise, will keep you out of trouble!

 

[doriboni]

in 1939, it took the Polish Army about one week to decrypt a German army 4 rotor Enigma machine message with a pencil and paper. The Brits wanted it sooner and built the first computer. A 4 rotor Enigma machine is many orders of magnitude less complex than what is used today on a two way radio system. But, in reality, all you still need is a pencil and paper and lots and lots and lots of time. When successful you'll know where the police stopped for a donut break a few years (decades) back. Then you are ready to start working on the next message--probably about some stray dog! May cause problems with the wife but otherwise, will keep you out of trouble!

Sorry but the 4 rotor Enigma didn't exist in 1939, it was a 3 rotor Enigma.

 

[piercescan]

Hello, good evening.
I've been wondering for a few days whether I can listen to encrypted P25 transmissions with my SDR. I've searched for frequencies, and they all say they're encrypted. Is there a solution?

Regards

NO

 

[GlobalNorth]

Self-levitation is probably easier.

 

[merlin]

I believe the Boatbod version of OP25 now supports ADP/ARC4.

Still need the keys.

 

[teedee911]

Hello, good evening.
I've been wondering for a few days whether I can listen to encrypted P25 transmissions with my SDR. I've searched for frequencies, and they all say they're encrypted. Is there a solution?

Regards

Negative, and if someone says yes you can....they're full of bull dung.