[ntp:questions] GPS Weakness Could Sink Wireless

Rob nomail at example.com
Fri Dec 13 09:20:12 UTC 2013

unruh <unruh at invalid.ca> wrote:
> On 2013-12-12, Rob <nomail at example.com> wrote:
>> Jan Ceuleers <jan.ceuleers at computer.org> wrote:
>>> Interesting Light Reading article on the degree to which infrastructure
>>> (in casu wireless networks) is dependent on GPS timing signals, how
>>> little is needed to jam GPS (intentionally or otherwise), and what the
>>> impact of such jamming would be.
>>> It also talks about how PTP might or might not mitigate some of these
>>> issues.
>>> http://www.lightreading.com/mobile/mobile-security/were-jamming-gps-weakness-could-sink-wireless/d/d-id/706895
>> It depends on the structure of the network and the required accuracy.
>> Remember that the usual GPS jamming methods are quite local in nature.
>> You can jam my GPS but that won't take out my DCF77 receiver or the
>> three GPS-synced servers I have configured as internet NTP sources.
> If they are in the same locality (or, depending on the strength of the
> jamming, local could mean within a few Km) they could also be jammed. 

Could could could
But how can the jammer know what sources the victim is using?
And where the receivers are located?

When they want to jam everything for sure, they could just detonate
a nuclear weapon in the ionosphere above the victim.

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