Abstract
In the age of the smartphone, Location Based Services (LBSs) have been immensely popular and changed the everyday routines of every individual user. However, an issue concerning the privacy and security of the user has been raised in the course of tracking the user as relevant and sensitive information about the user's location are revealed. This paper presents a survey of the current trends of privacy techniques employed in protecting the location privacy of users in LBSs. The paper further highlights the efficiency and deficiency of each technique discussed in this paper. The study, however, recommends that future researchers should endeavor to conduct a security analysis, simulation set-up and evaluate the proposed algorithm use of a modified Hilbert Curve to ensure the privacy efficiency of the proposed scheme.