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

Table 2

Notations for MPC operations.

Syntax	Output
[a] + [b], [a] + b	[a+b]
[a]−[b], [a] − b	[a−b]
[a]∗[b], [a]∗b	[a∗b]
lessThan ([a], b)	[1] if a < b, and
	[0] otherwise
equality ([a], b)	[1] if a == b, and
	[0] otherwise
reconstruct([a])	a