Research Article

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

Table 2

FN and FP for the Euclidean distance.

1 s 2 s 3 s 4 s 5 s

10.00/1.000.00/1.000.00/1.000.00/1.000.00/1.00
100.39/0.770.00/1.000.07/1.000.02/1.000.00/1.00
200.95/0.030.11/0.920.94/0.960.25/0.990.00/1.00
300.99/0.000.97/0.010.98/0.060.65/0.760.16/0.85
400.99/0.000.99/0.000.98/0.010.93/0.350.76/0.15
500.99/0.000.99/0.000.99/0.000.98/0.070.95/0.00
600.99/0.001.00/0.000.99/0.000.98/0.010.98/0.00
700.99/0.001.00/0.001.00/0.000.99/0.000.99/0.00
801.00/0.001.00/0.001.00/0.000.99/0.000.99/0.00