Dmrdecode encrypted

Forum for DMR, dPMR, NEXEDGE, Mototrbo, MARC, Tetra & all other DIGITAL modes

Dmrdecode encrypted

Postby kevtheskin » Thu Aug 06, 2015 10:00 am

Hello everyone.
Can somebody please tell me what to look for in Dmrdecoder when a frequency is encrypted. What does it say in the dmrlog window.


Cheers Kev
kevtheskin
 
Posts: 17
Joined: Sat Mar 09, 2013 9:35 pm

Re: Dmrdecode encrypted

Postby redman99 » Fri Aug 14, 2015 12:51 pm

Service Options : Non-emergency/Privacy Enabled/No priority
Group Address : 90 Source Address : 21

Use "save to file" look for the above Service Options

Hope this helps
Whistler TRX-2 BCD396T BCT15X CS-701 Plessey Vixen WinRadio G315 + other various old tat
redman99
 
Posts: 54
Joined: Sun Mar 15, 2015 1:03 pm

Re: Dmrdecode encrypted

Postby kevtheskin » Fri Aug 14, 2015 3:17 pm

Cheers for reply

Kev
kevtheskin
 
Posts: 17
Joined: Sat Mar 09, 2013 9:35 pm

Re: Dmrdecode encrypted

Postby arrkon » Thu Oct 15, 2015 5:11 pm

You would also see:

Alg=BP for basic privacy (1-255 fixed code)
or
Alg=EP for enhanced privacy (40bit encryption)

Copied from RadioReference:
Basic Privacy uses a 'fixed' key, which is set when the radio is programmed. There are 255 possible 'keys'. This level of Privacy can be compared to a digital version of analog 'inversion' scrambling. This level of encryption or scrambling isn't very secure, but is ok for keeping the 'casual' listener from hearing anything.

Enhanced Privacy uses a 40 bit encryption key, which is also set when the radio is programmed. However, Motorola went a step further and the actual 'data' that sent over the air, changes in every 'packet' (voice or data). So, this level of encryption can be compared to a digital version of analog 'rolling code' scrambling. This level of encryption or scrambling is much harder to 'break'. Typically, it can't be 'broken' by anything to which the general public is going to have. Some people have claimed that the Enhanced Privacy would be easy to break, but those same people have not given any indication that they've 'broken' it and I've seen nothing else, anywhere, that would indicate that anyone has 'broken' it.


More likely to see a mix of BP and Restricted Access to System (RAS), or both, As BP is encluded by moto for free.
arrkon
 
Posts: 9
Joined: Tue Sep 29, 2015 10:47 pm


Return to DMR & Digital Modes

Who is online

Users browsing this forum: No registered users and 1 guest