A Secure Storage and Sharing Scheme of Stroke Electronic Medical Records Based on Consortium Blockchain

Table 2

Comparison and analysis of schemes.

Properties	Pournaghi [6]	Zhang [14]	Luo [19]	Xu [26]	Chen [27]	Wang [28]	This paper
Application scenario	Personal life cycle management	Patient-oriented medical record sharing	Sharing of medical records among hospitals	Cross-domain visits	Clinical and scientific research	Sharing of medical records among hospitals	Sharing of referral medical records in medical treatment combination
Based on blockchain	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Fine-grained access control	Yes	Yes	Yes	No	No	No	No
Patient anonymous	No	Yes	No	Yes	No	No	Yes
Keywords searchable	No	No	No	No	Yes	Yes	Yes
Consensus mechanism	PBFT	PBFT	DPOS	—	—	Improved PBFT	Improved PBFT
Main chain pressure	Small	Big	Small	Small	Small	Small	Small
Smart contract	Yes	No	No	Yes	Yes	No	No