NSW Police Encryption key rollover

[SKEYGEN]

The slide about is a well known adage in the crypto industry - Its usually people letting the system down, not the technology.

If you had a friend in the police that had legitimate access to the Keys and Keyloader, and was willing to them with you, would you rat on them when you got caught selling keyloaded portables? Of course you wouldn't. It's far easier and safer to claim you cracked it it somehow...

NSWPF's inability to know good COMSEC doctrine even if it bites them on the nads has a fair bit to do with it, too. Doubt any other state agencies in Australia are any better.

[cartman]

Hi All,

Was running OP25 against a NSW Police channel and it appears the Encryption Sync metadata carried across the channel in the HDU and LDU2 fields has changed. The algorithm is still DES-OFB (type 0x81) however the KID (Key ID) has changed from 0x7001 to 0x8000.

Interesting stuff!

Cheers,
Matt

Still running the same key id on the metro GD channels as of today (3rd September 2012)
DSD for windows is rather crude but you can more or less work what algo type and key id is in place on conventional frequencies
Doesnt decode it of course but interesting all the same
I was using a tapped 780 Uniden.


Grant

[matthewn1983]

http://www.parliament.nsw.gov.au/prod/l ... acher).pdf

This new technology will enable the transfer of operational information directly to Mobile
Data terminals, thereby reducing voice traffic and ability to monitor information via digital
scanners. The expected timeframe for deployment to vehicles in Oxley Local Area
Command is August 2012.

*facepalm*

[cartman]

Hi All,

Was running OP25 against a NSW Police channel and it appears the Encryption Sync metadata carried across the channel in the HDU and LDU2 fields has changed. The algorithm is still DES-OFB (type 0x81) however the KID (Key ID) has changed from 0x7001 to 0x8000.

Interesting stuff!

Cheers,
Matt

Still running the same key id on the metro GD channels as of today (3rd September 2012)
DSD for windows is rather crude but you can more or less work what algo type and key id is in place on conventional frequencies
Doesnt decode it of course but interesting all the same
I was using a tapped 780 Uniden.


Grant

Looks the next key rollover has started .... starting to see $9000 on some radios using DSD
However the soon they move over onto the GRN the easier it will be do key changes .... every day if they wanted to!

[cartman]

And they have rolled over to a new key last week, confirmed by the Digitals Signals Decoder
Or more accurately the old key was made obsolete