3 ms·
the latency auth trick requires very fast timings, to distinguish between 5 ft and 25 ft... 20 feet difference is like 20 ns. (the attacker's parts don't need
by nullc 3y ago
the latency auth trick requires very fast timings, to distinguish between 5 ft and 25 ft... 20 feet difference is like 20 ns.
(the attacker's parts don't need to be high delay themselves, could be a pair of gain antennas and amplifiers.)
- contravariant 3y agoYou could of course use a phase difference instead of trying to measure sub nanosecond timings, but honestly it sounds like a nightmare to get right. Distance travelled by light will probably turn out to have very little in common with how we think it ought to work.