Privacy Preserving k-Nearest Neighbor for Medical Diagnosis in e-Health Cloud

Table 1

Functionality comparison with related works.

Functionality	[20]	[21]	Our study
Privacy of dataset	O	O	O
Privacy of input query	O	O	O
Privacy of kNN result	X	O	O
Privacy of data access pattern	X	O	O
Robustness for collusion attack	O	X	O