Sound-Proximity: 2-Factor Authentication against Relay Attack on Passive Keyless Entry and Start System

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/jat/volume-2018/1935974/figures/1935974.fig.004a.svgz" name="1935974.fig.004a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Outside parking</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/jat/volume-2018/1935974/figures/1935974.fig.004b.svgz" name="1935974.fig.004b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Underground parking</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/jat/volume-2018/1935974/figures/1935974.fig.004c.svgz" name="1935974.fig.004c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Road-side parking</td></tr></table>

<div>Three different environmental conditions.</div>

Journal of Advanced Transportation

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Figure 4

Figure 4: Sound-Proximity: 2-Factor Authentication against Relay Attack on Passive Keyless Entry and Start System 