2011 Apr 8, 2:07"On average their method gets to within 690 metres of the target and can be as close as 100 metres – good enough to identify the target computer's location to within a few streets.", "When a
landmark machine and the target computer have shared a router, the researchers can compare how long a packet takes to reach each machine from the router; converted into an estimate of distance, this
time difference narrows the search down further."
technical internet privacy geo geolocation security
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