On Sun, Aug 6, 2023 at 11:36 PM Mel Beckman <[email protected]> wrote: > > GPS Selective Availability did not disrupt the timing chain of GPS, only the > ephemeris (position information). But a government-disrupted timebase > scenario has never occurred, while hackers are a documented threat. > > DNS has DNSSec, which while not deployed as broadly as we might like, at > least lets us know which servers we can trust.
NTP has NTS, which all 5 servers I mentioned have, and many more also have. > Your own atomic clocks still have to be synced to a common standard to be > useful. To what are they sync’d? GPS, I’ll wager. Nope, they are synced to the reference atomic clock of National Observatory, pretty similar to USNO but local. Rubens
