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

Table 7

Time cost of each entity at each phase 0.76.

Phase	Involved entity	Operation	Time cost (s)
Identity authentication	Owner/requester	ECDSA.Sig + ECDSA.Ver	0.004739
	Supervise center	ECDSA.Sig + ECDSA.Ver	0.004739
Record generation and upload	Owner	2^∗ SHA256 + AES.Enc	0.000202
Record access	Owner	ECELG.Enc	0.002056
	Requester	ECELG.Dec + SHA256 + AES.Dec	0.455389