A Privacy Protection Method of Lightweight Nodes in Blockchain

Table 4

P_h (.) values using expansion, addition, and perturbation, respectively.

Number of inserted addresses	Privacy degree	Expansion	Addition	α = 0.51	α = 0.6	α = 1
N = 50	Ph(1)	0.0017	0.0017	0.0018	0.0018	0.0017
	Ph (25)	0	0	0	0	0
	Ph (50)	0	0	0	0	0
N = 100	Ph (1)	0.2673	0.6371	0.0018	0.0048	0.2676
	Ph (25)	0	0	0	0	0
	Ph (50)	0	0	0	0	0
N = 150	Ph (1)	0.9238	0.9994	0.0018	0.007	0.9239
	Ph (25)	0.0697	0.9809	0	0	0.0699
	Ph (50)	0	0.8814	0	0	0
N = 200	Ph (1)	0.9938	1	0.0018	0.0085	0.9938
	Ph (25)	0.8094	1	0	0	0.8096
	Ph (50)	0.2645	0.9999	0	0	0.2648
N = 250	Ph (1)	0.9992	1	0.0018	0.0096	0.9992
	Ph (25)	0.9734	1	0	0	0.9735
	Ph (50)	0.8385	1	0	0	0.8386