3 ms·How do you know that it’s not the majority of your sources that has been mitm’ed?by Xylakant 8y agoHow do you know that it’s not the majority of your sources that has been mitm’ed?datenwolf 8y agoNot all of these sources come through the Internet. Think GPS, GSM, radio time signals (DCF-77 or the likes).misterkgb 8y agoThose solutions all require additional hardware - hardware that's far more expensive than an on-board real-time clock and battery.