Icom dPMR encryption

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ciscovk

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Does anyone know if basic voice encryption Icom dPMR can be decrypted?
as far as I know there are only 32k codes options? Radio icom IC4062T / IC-F3400D dPMR
 

mmckenna

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Does anyone know if basic voice encryption Icom dPMR can be decrypted?
as far as I know there are only 32k codes options? Radio icom IC4062T / IC-F3400D dPMR
It can be decrypted if you have the key. But otherwise trying to guess is going to be impossible. There isn't a "universal" key that will let you listen to everything, and no legal/consumer grade gear that will decrypt automatically.
 

ciscovk

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It can be decrypted if you have the key. But otherwise trying to guess is going to be impossible. There isn't a "universal" key that will let you listen to everything, and no legal/consumer grade gear that will decrypt automatically.
Well, if the standard have really have only 32 000 combinations, its absolutely possible? or i may be wrong about that?
 

mmckenna

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Checking all 32,000 codes quickly enough to catch short duration transmissions, and hoping that they don't periodically roll their codes, while not totally impossible, is going to be extremely difficult.
And as Kazaww said, in most places, decrypting radio traffic that is not specifically intended for your use is illegal.
Finding/purchasing the tools to do this will raise some red flags.
 

boatbod

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DMR Basic Privacy has 255 different pre-defined 16 bit keys. You don't have to guess the key, you just have to guess which one is in use.
 

racingfan360

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Does anyone know if basic voice encryption Icom dPMR can be decrypted?
as far as I know there are only 32k codes options? Radio icom IC4062T / IC-F3400D dPMR
The Icom R30 will decode this...with a known key. In theory it could be brute forced. It may take 32,767 attempts though.
 

prcguy

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My R-8600 will decrypt, you just put it in dPMR mode, turn scrambling on and turn the big dial through 32,767 possible keys. I have not decrypted anything yet but if the descrambler opens fast you could quickly go through lots of combinations during a transmission.

If it will decrypt within a second you can do maybe 60 combinations a minute and all possible combinations in about 9hrs. That's worse case and you might hit it in the firs few hundred.
 

ciscovk

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R-8600 is a good scanner? at the moment im using uniden sds200 and aor DV-1, In fact, I don't really like the aor dv1 in terms of functionality and display information.
If the R-8600 could also will decode DMR, there would be an excellent device
 

vagrant

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The 8600 is a receiver that can scan memories. It can also scan freqs and auto store them. No DMR.

At times I wish there were some all-in-one devices, but then I remember I’m better off spreading out the tasks to several devices. Some overlap a little in their abilities, but a concise load for each provides more focused results.
 

hrh17

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Does anyone know if basic voice encryption Icom dPMR can be decrypted?
as far as I know there are only 32k codes options? Radio icom IC4062T / IC-F3400D dPMR
Yup easily done with the right tools...
 

ciscovk

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For example, I have a recorded transmission in dPMR format, encrypted, is there any software/device through which I can decrypt it or even manually guess the 32,767 possible keys? i think, i cannot do it via R-8600, R-8600 needs a real transmition?
 

racingfan360

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For example, I have a recorded transmission in dPMR format, encrypted, is there any software/device through which I can decrypt it or even manually guess the 32,767 possible keys? i think, i cannot do it via R-8600, R-8600 needs a real transmition?
I think you'd need some form of baseband modulator to take the raw [encrypted] audio recording and replay it/module to an rf signal to try and decode via your R8600 receiver. I have no idea how you might actually go about doing this in practice (but I'm interested to learn if some clever person out there can help).
 

slicerwizard

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Interesting what concepts some folks have trouble with.


Phase 4 : Decoding IDs (Caller's ID and TG), the formula is very strong ! It makes me crazy !


He's playing with encryption, but a simple ID encoding scheme is making him crazy. It clearly states that IDs are encoded from three base 10 values (0-9) and four base 11 values (0-9, *)

The "Crazy numbers !!!" are:

11 (11x1)

121 (11x11)

1331 (11x11x11)

14641 (11x11x11x11)

146410 (10x11x11x11x11)

1464100 (10x10x11x11x11x11)


It's no more complicated than 1234 = 1x1000 + 2x100 + 3x10 + 4x1...
 
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