bcBIM: A Blockchain-Based Big Data Model for BIM Modification Audit and Provenance in Mobile Cloud

Table 1

A comparison of three kinds of blockchain.

	Application of Decentralized Degree	Access Mechanism	Transaction Speed	Transaction Cost	Execution Efficiency	Application example
private	Centralize	Specific individuals or entities	fast	low	high	Acrblock
consortium	Partial decentralization	Authorized organizations or institutions	mid	mid	mid	R3, Hyperledger
public	Complete decentralization	All	slow	high	low	BTC, ETH, NEO