p25 on sdr#

[lord-sadler]

hello everyone, I'm new to SDR world so please bear with me!
I want to address a problem I had with my SDR# with p25 encryption, when I listen to any P25 conversation , I uses tetra modulator on SDRSHARP running on windows7 , it decodes the frequency but I cant hear the conversation, only the encryption, is there any way to decrypt it so that I can hear the conversations clearly?

THANKS IN ADVANCE FOR YOUR HELP!

 

[ronenp]

Tetra and p25 are different protocols and tetra demodulator cant decode p25 system and im not aware of any software that can decode encrypted traffic

 

[lord-sadler]

Thanks for reply
How to know what kind of encryption is in the frequency I'm trying to listen to?
like I said I'm new to RTL/SDR world

 

[boatbod]

Thanks for reply
How to know what kind of encryption is in the frequency I'm trying to listen to?
like I said I'm new to RTL/SDR world

Encryption or Codec Format?
P25 can be IBME or AMBE encoded, and it can simultaneously also be in-the clear (algId==0x80) or encrypted (algId<>0x80).
For the most part you are not going to be decrypting anything, but you can use the correct codec and hear unencoded P25 transmissions.

 

[lord-sadler]

Thanks for your reply,
Using SDR# and TETRA plugin, i managed to decode the traffic, but unfortunately it was encrypted, is there any way to decrypt it?

 

[jon895]

Thanks for your reply,
Using SDR# and TETRA plugin, i managed to decode the traffic, but unfortunately it was encrypted, is there any way to decrypt it?

nope you are SOL

 

[boatbod]

Thanks for your reply,
Using SDR# and TETRA plugin, i managed to decode the traffic, but unfortunately it was encrypted, is there any way to decrypt it?

Sure, if you have access to the encryption keys and a radio to program them into.

 

[lord-sadler]

THAT'S UNFORTUNATE, THANKS GUYS FOR YOUR HELP.