Securing Cooperative Spectrum Sensing against DC-SSDF Attack Using Trust Fluctuation Clustering Analysis in Cognitive Radio Networks

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2019/3174304/figures/3174304.fig.007a.svgz" name="3174304.fig.007a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Always-absent</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2019/3174304/figures/3174304.fig.007b.svgz" name="3174304.fig.007b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Always-present</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2019/3174304/figures/3174304.fig.007c.svgz" name="3174304.fig.007c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Always-absent</td></tr><tr class="fig-image" id="d"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2019/3174304/figures/3174304.fig.007d.svgz" name="3174304.fig.007d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Always-present</td></tr><tr class="fig-image" id="e"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2019/3174304/figures/3174304.fig.007e.svgz" name="3174304.fig.007e" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(e) </b>Always-absent</td></tr><tr class="fig-image" id="f"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2019/3174304/figures/3174304.fig.007f.svgz" name="3174304.fig.007f" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(f) </b>Always-present</td></tr></table>

<div>Suppressing DC-SSDF attack success ratio.</div>

Wireless Communications and Mobile Computing

fig7

Figure 7

Figure 7: Securing Cooperative Spectrum Sensing against DC-SSDF Attack Using Trust Fluctuation Clustering Analysis in Cognitive Radio Networks 