Privacy-Preserving Industrial Control System Anomaly Detection Platform

Protocol 2

Constant-round evaluation protocol.

	Initialization:
	for eachdo
	and agree on the same random seed ;
	end
	Preparing:
	;
	foreachdo
	generates ;
	generates keys for ;
	sends to , to ;
	end
	for eachdo
	for eachdo
	;
	;//feature selection
	Run 3-party shared OT protocol to get ;
	;//comparison
	end
	;
	Send to ;
	end
	for each do
	receives from , from ;
	for eachdo
	;
	;
	;//path evaluation
	;
	end
	;
	fordo
	Sum up the share of edge costs along -th leaf node’s path;
	;
	, ;
	;
	end
	, ;
	Send to
	end
	receives from , from ;
	for eachdo
	ifthen
	;
	for point function ;
	Send to , to ;
	Return ;
	end
	end
	for eachdo
	receives ;
	;
	;
	Return ;
	end