Trace Attack against Biometric Mobile Applications

Table 2

Results of face authentication application.

Face authentication application
	Alteration	Levels	Number of associations	Number of associations in
				Reference image	Altered image
Yale database	Blur	1	103	163	134
		2	65		106
		6	12		43
	Noise	1.45	65	79	169
		49.9	75		170
		90.36	119		123
	Luminosity	−44.61	86	79	118
		−15.64	114		126
		31	104		118
	Part of user image	48	68	79	118
		96	61		99
		240	36		60
	Mosaic	—	65	98	110
		—	35	79	113
		—	8	141	150
AR database	Blur	1	158	195	169
		3	133		152
		6	81		121
	Noise	1.4	137	195	314
		49.62	189		248
		90.36	140		198
	Luminosity	−44.61	181	195	194
		−15.64	190		195
		31	151		192
	Part of user image	48	147	195	204
		144	130		179
		240	105		164
	Mosaic	—	151	264	305
		—	146	251	451
		—	131	195	245