<div>The issue is not that the encryption is broken or there is a way to listen in, its that the network is vulnerable to denial of service attacks with very low cost equipment and detecting an attack is difficult.</div><div>
<br></div>Looks like they cant fix it without deviating from the P25 standard. This new attack method corrupts data to make decoding impossible and can also be targeted, so attackers could jam just encrypted traffic (and not touch data "in the clear"), a particular radio or the whole network. Also an attacker could force radios to transmit data, potentially identifying covert activities.<div>
<br></div><div>Another interesting point made in the research report is that the implementation of the encryption is possibly flawed due to the nature of two-way radio communications.<br><div><br></div><div><div class="gmail_quote">
On Sun, Aug 14, 2011 at 2:17 PM, Neill Ellis <span dir="ltr"><<a href="mailto:tgsnoopy@gmail.com">tgsnoopy@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
LOL...<br>
<br>
I understand the encryption system in this article is the same as the much touted NZ Police system.<br>
<br>
<<a href="http://news.cnet.com/8301-31921_3-20090434-281/security-flaw-found-in-feds-digital-radios/" target="_blank">http://news.cnet.com/8301-<u></u>31921_3-20090434-281/security-<u></u>flaw-found-in-feds-digital-<u></u>radios/</a>><br>
<br>
Fortunately it is all software upgradable... It will no doubt be upgraded to make it secure again.<br>
<br>
Neill.<br>
<br>
<br>
On 3/08/2011 7:08 p.m., Steve Austin wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I forgot to state that this is happening in Christchurch........Other areas not affected....Yet......But tests are happening.<br>
The biggest drawback from P25 is the hungry for power repeaters.....Constant 5 amp draw. Not good for remote sites.<br>
<br>
On Wed, Aug 3, 2011 at 7:01 PM, Steve Austin <<a href="mailto:nzscanners@gmail.com" target="_blank">nzscanners@gmail.com</a> <mailto:<a href="mailto:nzscanners@gmail.com" target="_blank">nzscanners@gmail.com</a>>> wrote:<br>
<br>
Maybe some here do not understand P25 and the systems involved.<br>
Ambulance are sharing the Police network in a testing<br>
phase.......They are on a node of the P25 system.....No problem<br>
plenty of space...<br>
Its also easier to put a ready to go radio onto the p25<br>
system...Its just unfortunate that the test radios happen to be<br>
AES/DES 256bit encrypted radios.<br>
<br>
<br>
Steve<br>
<br>
<br>
On Wed, Aug 3, 2011 at 6:48 PM, Oliver <<a href="mailto:nzoliver@hotmail.com" target="_blank">nzoliver@hotmail.com</a><br>
<mailto:<a href="mailto:nzoliver@hotmail.com" target="_blank">nzoliver@hotmail.com</a>>> wrote:<br>
<br>
Hi,<br>
<br>
They ARE trialling P25 encrypted. I know this for a fact. You<br>
can hear some of the ambos on analogue as not all of them have<br>
the new radios. The amount of ambo traffic on the analogue is<br>
way down if you have been a long time listener.........<br>
<br>
<br>
<br>
------------------------------<u></u>--------------------<br>
From: "Neill Ellis" <<a href="mailto:tgsnoopy@gmail.com" target="_blank">tgsnoopy@gmail.com</a><br>
<mailto:<a href="mailto:tgsnoopy@gmail.com" target="_blank">tgsnoopy@gmail.com</a>>><br>
Sent: Wednesday, August 03, 2011 12:17 PM<br>
To: "Grant Carroll" <<a href="mailto:grant.carroll@xtra.co.nz" target="_blank">grant.carroll@xtra.co.nz</a><br>
<mailto:<a href="mailto:grant.carroll@xtra.co.nz" target="_blank">grant.carroll@xtra.co.<u></u>nz</a>>>; <<a href="mailto:thelist@radiowiki.org.nz" target="_blank">thelist@radiowiki.org.nz</a><br>
<mailto:<a href="mailto:thelist@radiowiki.org.nz" target="_blank">thelist@radiowiki.org.<u></u>nz</a>>><br>
Subject: Re: [TheList] Christchurch Ambulance now digital<br>
<br>
<br>
Hi Grunter,<br>
<br>
I think you might be on to something. I'm pretty sure the<br>
media would have let us know if Ambo's were trialling or<br>
had gone secure digital.<br>
<br>
Regards,<br>
<br>
Neill.<br>
<br>
<br>
On 3/08/2011 11:50 a.m., Grant Carroll wrote:<br>
<br>
Hello,<br>
I am still listening to ambos on the same frequencies<br>
in the ESB band they have been on for ages. This is on<br>
an analogue scanner and my digital scanner with no<br>
"P25" coming up to suggest the transmissions are<br>
digital and obviously if I can hear them on an<br>
analogue scanner they aren't. Am I missing something<br>
here? Are they being simulcast on analogue and new<br>
digital frequencies for now or is their going digital<br>
just a vicious rumour?<br>
Cheers guys.<br>
Grunter1.<br>
<br>
<br>
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