A Fair and Privacy-Preserving Image Trading System Based on Blockchain and Group Signature

Algorithm 3

Merkle tree verification.

	Input:
	for each do
	ifthen
	ifthen
	Terminate and Output
	end if
	else
	ifthen
	Terminate and Output
	end if
	end if
	ifthen
	Output 1
	else
	Output 0
	end if