An Improved Privacy-Preserving Framework for Location-Based Services Based on Double Cloaking Regions with Supplementary Information Constraints

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/scn/volume-2017/7495974/figures/7495974.fig.003a.svgz" name="7495974.fig.003a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Cloaking region is formed by randomly matching the number of queries</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/scn/volume-2017/7495974/figures/7495974.fig.003b.svgz" name="7495974.fig.003b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Cloaking region is formed according to the closest number of query</td></tr></table>

<div>Two mechanisms of generating cloaking region.</div>

Security and Communication Networks

fig3

Figure 3

Figure 3: An Improved Privacy-Preserving Framework for Location-Based Services Based on Double Cloaking Regions with Supplementary Information Constraints 

Figure 3 | An Improved Privacy-Preserving Framework for Location-Based Services Based on Double Cloaking Regions with Supplementary Information Constraints 