Hidden DSDPlus switches??

[Boatanchor]

Not sure if there are any, but the function of some of the existing switches are not well defined anywhere.

For example, adding -v4 on a P25 network produces Key ID (KID#), Encryption Algorithm (AES/DES) and other information..

Makes me wonder if there are other 'hidden' switches or functions

 

[mtindor]

I have no idea if there are any hidden switches in DSD+. Wouldn't surprise me if there was though. What I am sure of is that the author of DSD+ would become giddy if he knew that people were going through thousands of permutations of possible commandline switches trying to find something obscure.

M

 

[br0adband]

-v4 really isn't 'hidden' since the info is right there in the DSD+ user guide:

Display/Logging options:
      --          Don't show command line options in window title
      -v<num>     Frame information verbosity (0-4) [-v2]

It's true there's no actual info about what each one particularly adds so, -v2 is the default, -v3 was what I did use for a while, now I just default to -v4 on everything.

 

[mancow]

Is there a way to view what flavor of encryption is being used on conventional frequencies? I thought there was a code that corresponded to the various algos but when I run -v4 I get a series of binary strings after LSD. How can I see the KID and algo?

 

[br0adband]

Are you talking about P25 encrypted comms? I was attempting to monitor Nellis AFB earlier and noticed some traffic that muted DSD+ but I did get a second or two of that garbled speech before it went silent, when I switched to the DSD+ window I noticed AES 256 at the end of the line (I use -v4 always) so that's only the second time I've captured some encrypted traffic - well, technically I didn't since I wasn't recording at the time but at least I did notice the AES 256 info on the window before it scrolled on by.

Not sure about other modes like DMR/MOTOTRBO or NXDN in that respect, but at least for me and my severely limited P25 monitoring experience, I've seen AES 256 at least twice now using -v4 with DSD+.

YMMV as always.

 

[mancow]

I'm talking about P25 non trunked. I have an FBI freq active now ENC and it's not showing any sort of ENC ID using -V4.

 

[racingfan360]

>I've seen AES 256 at least twice now using -v4 with DSD+.
The only P25 I can occasionally monitor is at a USAF base...it too decodes as AES256 with the KID or CLEAR (with KID:0).

Jim

 

[Boatanchor]

Is there a way to view what flavor of encryption is being used on conventional frequencies? I thought there was a code that corresponded to the various algos but when I run -v4 I get a series of binary strings after LSD. How can I see the KID and algo?

Courtesy of the Daniels Electronics 'P25 Training Guide':

Algorithm ID (ALGID)
The Header Code Word and Encryption Synchronization (LDU2)
contain the 8 bit ALGID field. The ALGID identifies the encryption
algorithm used in the P25 system. The ALGID is entered through
a Key Management Facility or Key Loader when entering encryption
keys.

The ALGID’s that have been defined for Type 1 algorithms are:

$00 ACCORDION 1.3
$01 BATON (Auto Even)
$02 FIREFLY Type 1
$03 MAYFLY Type 1
$04 SAVILLE
$41 BATON (Auto Odd)
$80 Unencrypted message (no encryption algorithm)
$81 DES-OFB encryption algorithm
$82 2-key triple DES encryption algorithm
$83 3-key triple DES encryption algorithm
$84 AES encryption algorithm

Key ID (KID)

The Header Code Word and Encryption Synchronization (LDU2)
contain the 16 bit KID field. The KID identifies the specific encryption
key for use when multiple encryption keys have been loaded into the
encryption modules. The KID is also used for single encryption key
systems. The typical default KID for clear or secure systems is $0000.
The KID is entered through a Key Management Facility or Key Loader
when entering encryption keys.

 

[Forts]

A more complete list, from P25.ca:

$00 Accordion 1.3
$01 Baton (auto even)
$02 Firefly
$03 Mayfly
$04 Saville
$41 Baton (auto odd)
$80 Unencrypted (clear)
$81 DES-OFB
$83 Triple DES (168-bit, ECB)
$84 AES-256
$85 AES-128 (GCM)
$88 AES-CBC
$9F DES-XL
$A0 DVI-XL
$A1 DVP-XL
$AA ADP

 

[mancow]

I wish I had a screen shot. Basically what I'm saying is I'm not seeing any indicator of the ENC type at all. I did when monitoring channels from a trunking system on 800 MHz but not the Vhf Fed frequency. I get a string of 00010001 0011000010 something like that after each packet.

 

[mancow]

This is what I'm seeing on the ENC FED Channel.

 

[DaveNF2G]

Perhaps the errors are preventing proper decode of the encryption identifier.

 

[wildbillx]

Forgive my ignorance but how do you have the v4 option added on dsdplus to wear it opens every time? I am looking to see the encryption identifier. Also is there any way to see any info on what kind of trbo privacy? Thanks

 

[RonnieUSA]

Forgive my ignorance but how do you have the v4 option added on dsdplus to wear it opens every time? I am looking to see the encryption identifier. Also is there any way to see any info on what kind of trbo privacy? Thanks

Can't help with Trobo, but for DSD Plus try this:

dsd -v4

 

[mancow]

It must have been poor quality of signal because it's working now and showing the Key ID and algo.

 

[RonnieUSA]

It must have been poor quality of signal because it's working now and showing the Key ID and algo.

The way I copy from DSDPlus is with this switch; >LogFile.txt
If You leave it to default, ( >LogFile ) You can't open it till You close DSDPlus, but with the .txt extension You can open, and read to the point when You opened it.


[E] Channel Group & User: tg=65535 src=800002
Sync:+P25p1 NAC:181 LDU2
LSD: 00000000 00000000

LDU2 ES: MI: 00 00 00 00 00 00 00 00 00 KID: 0 AlgID: 80 - CLEAR

Sync:+P25p1 NAC:181 LDU1
LSD: 00000000 00000000

[E] Channel Group & User: tg=65535 src=800002
Sync:+P25p1 NAC:181 LDU2
LSD: 00000000 00000000

LDU2 ES: MI: 00 00 00 00 00 00 00 00 00 KID: 0 AlgID: 80 - CLEAR

Sync:+P25p1 NAC:181 LDU1
LSD: 00000000 00000000

[E] Channel Group & User: tg=65535 src=800002
Sync:+P25p1 NAC:181 LDU2
LSD: 00000000 00000000

LDU2 ES: MI: 00 00 00 00 00 00 00 00 00 KID: 0 AlgID: 80 - CLEAR

Sync:+P25p1 NAC:181 LDU1
LSD: 00000000 00000000

[E] Channel Group & User: tg=65535 src=800002
Sync:+P25p1 NAC:181 LDU2
LSD: 00000000 00000000

LDU2 ES: MI: 00 00 00 00 00 00 00 00 00 KID: 0 AlgID: 80 - CLEAR

Sync:+P25p1 NAC:181 LDU1

 

[brandon]

Guess I should read this forum more often I just stumbled across this thread.

Totally awesome using that -v4 switch on conventional federal stuff & having it show the radio ID and enc type.