Fraoch
join:2003-08-01
London, ON | Anonymously Track a PC Anywhere on Net
Oh, very nice. I'm sure ISPs would love to know how many devices are connected to their line so they could increase charges accordingly.
It could have some good security benefits but it sure opens the doorway to abuse. |
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Fraoch
join:2003-08-01
London, ON
| Hmm, perhaps this may lead to utilities out there that will alter the clock settings of networking chips slightly.
I'm not talking massive overclocks, I'm talking very slight clock alterations.
I'm not even sure it's possible. Just an idea. |
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ronpin
Imagine Reality
join:2002-12-06
Nirvana
 ·AT&T Southwest
 ·Charter Pipeline
| From the cited PDF paper...
...and we show how one might use a Fourier transform on packet arrival times to infer a device’s clock skew. ...
They almost had me believing it. Packet arrival times have random influences that no "Fourier transform" could account for. This is bullshit -- the paper is a fraud -- but I"ll keep reading it just to make sure. Besides, I'm pretty sure that TCP does not waste 32 bits on a time stamp unless there is a real-time/ordering requirement (but that could have changed in the last 5 years since I dealt with it). ICMP request are mentioned -- but don't most router firewalls block those anyway?
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Lord protect me from your followers |
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sman83
join:2004-11-09
Urbana, IL | reply to Fraoch
From how I read is it possible to just turn off timestamps in the tcp/ip? Then no more detection |
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Fraoch
join:2003-08-01
London, ON
| said by sman83  :From how I read is it possible to just turn off timestamps in the tcp/ip? Then no more detection Hmm, yeah, hopefully that will do it!:) |
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teambnet
Team B Group
Premium
join:2003-05-06
Chicago, IL
| reply to ronpin
I agree: total BS. It would be impossible for a single deployed solution to parse traffic from a constantly evolving number of arrangements behind customers' public interfaces- especially if LAN side hacks appeared that were designed to overwhelm and not just obscure. |
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tquade
join:2000-10-14
Regina, SK | Concur, although, it could be done with a laplace transform, a bit of convolution and a sprinkling of negative phlogiston.
Ted |
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MoeDumb
I already have a Messiah.
Premium
join:2002-09-23 | It's crackers to slip a rozzer the dropsy in snide.
(I don't know what the hell I'm talking about either.)
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"tick...tick...tick..." »www.jtf.org/ |
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jaxjaguar
join:2001-05-29
Northridge, CA
| reply to ronpin
On the BS bandwagon myself. I'm no TCP protocol expert, but doesn't a NAT router change the time stamp when it NAT's the packet? And if it currently doesn't, I'm sure it's just a simple firmware change to add that feature and make the ISP's efforts worthless.
So there's nothing to worry about here. |
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