PPSTN and Encryption

[ve5wil]

Noticed something neat with DSDPlus and the psr800

On encrypted comms, it shows what encryption used and the key ID.

From just watching the last couple days, it appears the RCMP keep the same key ID. The surprise.. Moosejaw EMS city 1 appears to have OTAR encryption. There have been a few encrypted coms show up from EMS and the key ID changes with each PTT press.

As for Moose Jaw police... DSDPlus sees the system... Sees the Nac, and encryption key... Just can't identify what the trunked protocol is. Dosent appear to be x2tdma. Something closer to p25p1

 

[ve5wil]

sample of what DSDPlus is seeing

2015/05/20 07:34:41 Enc Group call; TG=4119 RID=2241776 AlgID=9E KeyID=49152 4s
2015/05/20 07:35:29 Enc Group call; TG=4119 RID=2241785 Alg=DES-OFB KeyID=41006 3s

2015/05/20 08:14:53 Enc Group call; TG=10 RID=2211090 Alg=AES KeyID=57 2s
2015/05/20 08:15:00 Enc Group call; TG=10 RID=2219005 Alg=AES KeyID=57 1s
2015/05/20 08:15:03 Enc Group call; TG=10 RID=2211090 Alg=AES KeyID=57 16s
2015/05/20 08:15:21 Enc Group call; TG=10 RID=2219005 Alg=AES KeyID=57 1s

2015/05/20 13:59:45 Group call; TG=6106 [15 WING MP] RID=2264450
2015/05/20 13:59:51 Enc Group call; TG=6106 [15 WING MP] RID=2264450 AlgID=75 KeyID=32432 1s

2015/05/21 03:22:55 Enc Group call; TG=4119 [MJFD Dispatch] RID=2241757 [MJFD Portable 2] Alg=DES-OFB KeyID=6208
2015/05/21 03:22:58 Group call; TG=4119 [MJFD Dispatch] RID=2241763 [MJFD portable 8] 1s
2015/05/21 03:23:02 Enc Group call; TG=4119 [MJFD Dispatch] RID=2241757 [MJFD Portable 2] AlgID=25 KeyID=20735 1s

2015/05/20 08:20:18 Enc Group call; TG=5282 [MJ EMS CITY 1] RID=2251543 AlgID=4B KeyID=8498 1s
2015/05/20 14:24:37 Enc Group call; TG=5282 [MJ EMS CITY 1] RID=2251550 AlgID=40 KeyID=53248
2015/05/20 14:24:40 Group call; TG=5282 [MJ EMS CITY 1] RID=2251550 2s
2015/05/20 14:24:44 Enc Group call; TG=5282 [MJ EMS CITY 1] RID=2251550 AlgID=83 KeyID=59586