nanog mailing list archives
Re: huawei
From: Jazz Kenny <trapperjohn117 () gmail com>
Date: Sat, 15 Jun 2013 12:50:51 -0700
What about through SDR? ie. http://nuand.com/ I mean, 'subscriber' seems to indicate a layman, but SDR isn't too complex to get running for someone with a modicum of electronics experience - especially in this day and age, where oscilloscopes and frequency analysis is available to anyone with some Google-fu. On Sat, Jun 15, 2013 at 11:11 AM, Jay Ashworth <jra () baylink com> wrote:
----- Original Message -----From: "Scott Helms" <khelms () zcorum com>Is it possible? Yes, but it's not feasible because the data rate would be too low. That's what I'm trying to get across. There are lots things that can be done but many of those are not useful. I could encode communications in fireworks displays, but that's not effective for any sort of communication system.At this point, of course, we hearken back to the Multics system, which needed -- in order to get the B1(?) common criteria security rating that it had -- to prevent Covert Channel communication between processes of different security levels *by means as low-bandwidth as sending morse code by modulating the system load*. So I don't think "there's too little bandwidth" is a good enough argument, Scott. But there's a much more important issue here: In some cases, like the Verizon Wireless 4G puck I mentioned earlier, manufactured by ZTE, *you can't see the back side of the device*. There's nearly no practical way for a subscriber to know what's coming out of the 4G side of that radio, so it could be doing anything it likes. Verizon Wireless proper could know, but they have no particular reason to look and, some might argue, lots of reasons not to want to know. Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
Current thread:
- Re: huawei, (continued)
- Re: huawei Scott Helms (Jun 14)
- Re: huawei Jimmy Hess (Jun 14)
- Re: huawei Scott Helms (Jun 15)
- Re: huawei Rich Kulawiec (Jun 15)
- Re: huawei Michael Thomas (Jun 15)
- Re: huawei Randy Bush (Jun 15)
- Re: huawei joel jaeggli (Jun 15)
- Re: huawei cb.list6 (Jun 15)
- Re: huawei Eugen Leitl (Jun 15)
- Re: huawei Jay Ashworth (Jun 15)
- Re: huawei Jazz Kenny (Jun 15)
- Re: huawei Jay Ashworth (Jun 15)
- Re: huawei Phil Fagan (Jun 16)
- Re: huawei Jay Ashworth (Jun 16)
- Message not available
- Re: huawei Jazz Kenny (Jun 16)
- RE: huawei chris burri (Jun 16)
- Re: huawei Phil Fagan (Jun 16)
- Re: huawei Warren Bailey (Jun 16)
- Re: huawei Scott Helms (Jun 18)
- Re: huawei Eugen Leitl (Jun 15)
- Re: huawei Scott Helms (Jun 15)