Table 1. The notations in this article.

Notation	Description
CA	Certificate authority
RK	Randomly generated symmetric key
DB	Database
PK	Private key of an organization
PID	Patient Unique Identity
Encr	Encryption of data using a specific key
MID	The term MID refers to a member’s unique identity
Dsign	Digital signature of data, which is signed by admin
secKey	A member’s secret key
r	Refers to resources such as a patient’s medical records/Resources
$\mid \mid$	Evaluates whether either policy has been satisfied
R1, R2 $\dots$ Rn	Roles and permitted operations for users 1, 2…n
$Polic{y}_{sub}$	The data requester’s authorization to access data resources
$\alpha$	A user’s unique attributes
$\hat{}$	Requester must conform to the organization’s policies, data policies, and allowed actions
T1	Starting time for data requests
T2	Ending time for data requests
W( $a_n$)	Weight of a feature in relation to attribute ( $a_n$)
R( $a_n$)	Range of a selected attribute ( $a_n$)
D(p)	Severity level of patient ‘p’
ET	In case of an emergency, a team was created to get patient records
PR	Refers to the access control policy rule