SPCTR: Sealed Auction-Based Procurement for Closest Pre-Tender with Range Validation

Algorithm 3

CloPCmp.

	Input:
	At PM: the encrypted bids , the encrypted pre-tender ;
	At PA: The key pair ();
	Output:
	At PM: The index of the supplier who owns the closest pre-tender bid
	At PA: ;
(1)	At PM:
(2)	Choose number of -bit random values ;
(3)	for to do
(4)	Compute
(5)	Send to PA;
(6)	At PA:
(7)	for to do
(8)	Decrypt to get ;
(9)	Compute ;
(10)	Re-encrypt ;
(11)	Send to PM;
(12)	At PM:
(13)	for to do
(14)	Compute
(15)
(16)	return