Key-Value Data Collection with Distribution Estimation under Local Differential Privacy

Table 2

Data sets.

Data sets	#Ratings	#Users	#Keys	Selected
E-commerce	23,486	23,486	1,206	3
Clothing	192,544	105,508	5,850	5
Amazon	2,023,070	1,210,271	249,274	5
Movie	20,000,263	138,493	26,744	100