Security Token Questions
Jeff Liebermann wrote:
Tuning fork and watch quartz crystal oscillators out of fashion. The
better dongles use a MEMS RTC (real time clock) that has built in
temperature compensation via a lookup table. Drift is negligible:
https://en.wikipedia.org/wiki/Microelectromechanical_system_oscillator
Big fun when there is only a slight concentration of helium in the air!
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