Mobile users increasingly report their co-locations with other users, in addition to revealing
their locations to online services. For instance, they tag the names of the friends they are …

Co-location information about users is increasingly available online. For instance, mobile
users more and more frequently report their co-locations with other users in the messages …

The breach of users' location privacy can be catastrophic. To provide users with privacy
protections, numerous location privacy methods have been developed in the last two …

It is a well-known fact that the progress of personal communication devices leads to serious
concerns about privacy in general, and location privacy in particular. As a response to these …

Over the past decade, the research on data privacy has achieved considerable
advancement in the following two aspects: First, a variety of privacy threat models and …

The continuously increasing use of locationbased services poses an important threat to the
privacy of users. A natural defense is to employ an obfuscation mechanism, such as those …

Location-Based Social Network (LBSN) applications that support geo-location-based
posting and queries to provide location-relevant information to mobile users are increasingly …

Mobile users increasingly make use of location-based online services enabled by
localization systems. Not only do they share their locations to obtain contextual services in …

Mobile users expose their location to potentially untrusted entities by using location-based
services. Based on the frequency of location exposure in these applications, we divide them …

With the ubiquitous adoption of smartphones and mobile devices, it is now common practice
for one's location to be sensed, collected and likely shared through social platforms. While …