4 ms·
With enough data points you'd easily figure out that offset. Just overlay each data point with map data and decide whether the location makes sense. (i.e. you'
by algesten 6y ago
With enough data points you'd easily figure out that offset. Just overlay each data point with map data and decide whether the location makes sense.
(i.e. you're unlikely to most of the time be in the middle of a lake, farm field etc)
- deleted 6y ago[deleted]
- mikepurvis 6y agoOr if the person is traveling at highway speed, it would be pretty easy to fit that track to nearby highways.
- andreareina 6y agoOffset as function of user and location?
- jessaustin 6y agoWhere is this function stored?
- ganafagol 6y agoAs a random secret in the reporting device. The secret can then be used with a cryptographic hash to produce a deterministic but unpredictable offset, based on the current location. Something like: reported_position = true_position + hash(secret + true_position)
- ganafagol 6y agoHm that will essentially behave like random noise though, assuming that the position is sufficiently high resolution. So you'll need to round it in any case, and once you do that heavily enough, there is no need for this crypto magic.