Using an Efficient Detection Method to Prevent Personal Data Leakage for Web-Based Smart City Platforms

Table 6

Percentage of file similarity.

File similarity percentage	Comparison time (min)	Scanning time (min)	No. of files	No. of nonrepeated personal data	Percentage of nonrepeated personal data (A)	Percentage of time (B)	Value of weight W2
	(A)	(B)		(C)	(D = C/14,562)	(E = (A + B)/352)	(D × D/E)
99%	4	228	5,770	14,439	99.16%	65.91%	1.49
97%	5.5	185	4,551	14,363	98.63%	54.12%	1.80
95%	7	157	3,927	14,309	98.26%	46.59%	2.07
93%	9	144	3,603	14,053	96.50%	43.47%	2.14
91%	11.5	136	3,370	13,856	95.15%	41.90%	2.16
90%	13	131	3,248	13,807	94.82%	40.91%	2.20
85%	19	129	2,705	13,410	92.09%	42.05%	2.02
80%	27	125	2,332	13,067	89.73%	43.18%	1.86
75%	35	122	2,031	12,506	85.88%	44.60%	1.65
70%	44	117	1,795	11,735	80.59%	45.74%	1.42
65%	55	113	1,664	11,518	79.10%	47.73%	1.31
60%	72	104	1,575	11,006	75.58%	50.00%	1.14
55%	88	97	1,503	10,458	71.82%	52.56%	0.98
50%	104	92	1,443	10,291	70.67%	55.68%	0.90
Full-scan mode	0	352	8,449	14,562	100.00%	100.00%	1.00