![]() ![]() Khanna was also able to determine where his casual acquaintance ended up at night, deducing not only exactly which dorm he slept in, but also which room. To prove his own point, Khanna used Marauders Map to track one of his brother’s friends for a couple of weeks.Įven though he himself doesn’t know the Stanford student all that well, they are friends on Facebook, and so Khanna was able to use his target’s frequent use of the messaging service to work out his weekly routine. The first thing I noticed when I started to write my code was that the latitude and longitude coordinates of the message locations have more than 5 decimal places of precision, making it possible to pinpoint the sender's location to less than a meter. That Facebook has that data at its disposal is probably no surprise, but the ease with which it can be extracted from the social network, and the accuracy with which it can track someone – to within just one metre – may comes as a shock.Įven developer Aran Khanna concedes that such accurate tracking is “a bit weird,” saying via Medium that: The extension – called Marauders Map after the magical chart from the Harry Potter books that reveals the location of every person within Hogwarts School – works by scooping up the location data of Facebook Messenger users and plotting it on a map. A Chrome browser extension developed by a Harvard College computer science student allows people to pinpoint and track the location of Facebook Messenger users. ![]()
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