A Secure and Privacy-Preserving Medical Data Sharing via Consortium Blockchain

Table 5

Comparison of the functions of similar schemes.

Scheme	Consensus mechanism	Access control	Key management	Data confidentiality	Data integrity	Data auditability	Simulation experiment
Azaria’s [16]	Pow	Coarse grained, through time				✓
Liang’s [25]	PBFT	Coarse grained, through channels				✓	✓
Wang’s [30]	PoS	Fine grained, through attribute		✓	✓		✓
Ours	IBFT	Fine grained, through attribute	✓	✓	✓	✓	✓