NIST NTP servers

Valdis.Kletnieks at vt.edu Valdis.Kletnieks at vt.edu
Wed May 11 17:54:25 UTC 2016


On Wed, 11 May 2016 15:36:34 -0000, "Jay R. Ashworth" said:

> CDMA and GSM are false diversity: both network types nodes *get their time*
> from GPS, so far as I know.

I'll make the fairly reasonable assumption that most readers of this list have
networks that span multiple buildings.

If somebody is managing to figure out that you have a GPS in Building 37, and a
GPS-based CDMA up on the corner of Building 3, and the *other* 4 clocks at
other locations and getting close enough to all of them at the same time to
conduct a successful spoofing attack, all just to move your time source a
few seconds off....

...  then the fact that GPS is spoofable is probably *NOT* your biggest
security problem.

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