Node Location Privacy Protection in Unattended Wireless Sensor Networks

Table 7

Compare the track-back error hop number (security time) of the four methods at different detectable angles.

	Methods
	PU SBRF	MoRF	PLAUDIT	MST
30	5.00	2.59	2.68	3.91
40	7.58	5.76	7.45	6.92
50	10.02	6.65	7.38	7.78
60		7.50	7.75	12.10
70			7.65	12.65
80			8.13	13.46
90				13.46
100				16.35
110				18.29
120				18.94