  Trilateration has recently become one of the well-known threat models to the
user's location privacy in location-based applications (aka: location-based
services or LBS), especially those containing highly sensitive information such
as dating applications. The threat model mainly depends on the distance shown
from the targeted victim to the adversary to pinpoint the victim's position. As
a countermeasure, most of location-based applications have already implemented
the "hide distance" function to protect their user's location privacy. The
effectiveness of such approaches however is still questionable. Therefore, in
this paper, we first investigate how popular location-based dating applications
are currently protecting their user's privacy by testing the two most popular
GLBT-focused applications: Jack'd and Grindr.
