AOR AR-DV1 Secret Encrypt Codes?

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AOR AR-DV1 Secret Encrypt Codes?

Postby Mark5R » Sat Jan 12, 2019 7:26 pm

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I came across this recently posted on a Japanese website, I translated it from Jap to Eng and the original is from yamanekosuke.com

The secret codes they mean are obviously encryption codes. Does anyone here know more about what this capability is.

Will it decrypt enc codes? Or will the AOR accept enc codes and decrypt?

And what applications does this work for? DMR? Tetra even?

We use Mototrbo DMR at work with basic privacy. I know the key as I am authorised, even with the key I can't listen on my Whistler TRX-2 as its encrypted and I didn't think the DV1 would accept it but is this possible? Sorry peeps I just can't make definitive head or tail of the article and hope someone else can help?
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby Metradio » Sat Jan 12, 2019 7:50 pm

It works for NXDN 48, it will unscramble their basic privacy within 2 seconds and display the current key:

From the AOR documentation:

"NXDN Descramble function
------------------------
(For 15 bit digital scrambling mode NXDN signals. Does not
support encrypted mode NXDN signals )
-Select the NXDN mode (=D-CR) or AUTO mode.
Once the desired signal is received:
-Click once on the main tuning dial
-Long press on MODE button
The blinking question marks means that AR-DV1 is searching for
the descrambling code. It just takes 1 or 2 seconds if reception
conditions are good. Once found, it will display the scramble
code such as 000015 for example and you will hear the decoded
voice.

Please note that although the display shows "ENC.CODE", it
actually means "descramble" code. No relation to encryption.

AR-DV1 and NXDN standard encryption (scrambled) decoding,
the DV1 will only decode scrambling on 6.25KHz NXDN4800 systems.."

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD.
WS1088 / TRX-1 / Whistler Q /UBCD3600XLT / WTR Browser.
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby moj » Sat Jan 12, 2019 8:50 pm

Just as Mike said it work's fine on nexedge but it doesn't work on idas digital radio's due to it being a different system !!
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby Mark5R » Sat Jan 12, 2019 10:03 pm

Thanks moj and Metradio. Both of you very helpful and informative as usual :thumbup:
Whistler TRX-2 ~ Funcube Dongle Pro+
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby mark99 » Sun Jan 13, 2019 1:33 pm

Does it display any data for DMR.
Not does it work, does it display any information for the enc code on a secure system ?
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby jimh » Sun Jan 13, 2019 1:42 pm

moj wrote:Just as Mike said it work's fine on nexedge but it doesn't work on idas digital radio's due to it being a different system !!


Moj: Can you confirm, when you refer to Icom IDAS here do you mean dPMR format, or IDAS radios working NXDN Very Narrow (aka 6.25khz or NXDN4800) mode?
Since the scrambling performed is just a simple XOR of the plaintext data with the key value, I "expected" the IDAS implementation of the NXDN Very Narrow to follow the NXDN standard and therefore the AOR DV-1 to work as per the Kenwood implementation. But perhaps reality and your experience is different?

I also see that the Icom R30 can descramble NXDN Narrow, Very Narrow and dPMR but only given a known scrambling key. I guess that in practice - through brute force of the 32k or so keys, you could break this out.
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby Metradio » Sun Jan 13, 2019 3:02 pm

mark99 wrote:Does it display any data for DMR.

Yes, Slot and Colour Code.
Not does it work, does it display any information for the enc code on a secure system ?

No.

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD.
WS1088 / TRX-1 / Whistler Q /UBCD3600XLT / WTR Browser.
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby jimh » Sun Jan 13, 2019 6:07 pm

mark99 wrote:Does it display any data for DMR.
Not does it work, does it display any information for the enc code on a secure system ?


For DMR, DSD+ will tell you: if there is encryption present, if it is Basic or Enhanced Privacy, and the Key ID in use (ie the location of the key to use in the radios memory as several keys can be stored. This is NOT the actual encryption key used as part of the encryption and decryption process, which is not transmitted over the air).
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby moj » Mon Jan 14, 2019 8:48 pm

Hi Jim ! i can confirm i tried on a Idas repeater system and it would not sniff the key at all which was the main reason i bought a dv1 thinking it would be able to etc

and a lot of people class dpmr as idas when after a lot of testing that didn't seem the case ?

i also own the kenwood 3401d and icom 4029 sdr dpmr handheld's and there was def difference's like they couldn't be heard on dsd at all yet the idas handheld's i had could but obviously this scramble code was really beating me at the time on the system .

hope that help's ;)
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Re: AOR AR-DV1 Secret Encrypt Codes?

Postby jimh » Mon Jan 14, 2019 9:20 pm

Hi Moj...thanks for that chap. Must admit, the whole IDAS thing still confuses me, as Icom seem to use the terminology to mean lots of different things. I know they're a bit cheaper than Kenwoods, but I much prefer the latter: simple and effective. I'm guessing the 'IDAS handhelds' you refer to probably do confirm to the NXDN standard if DSD was able to decode. I wouldn't expect DSD+ to decode the 3401d and 4029 you mention (but you should get IDAS frames decoded ok with the FL version of DSD+ with the -fm switch specifically set).
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