Efficient and Secure Cross-Domain Sharing of Blockchain Electronic Medical Records Based on Edge Computing

Table 1

Symbol description.

Symbols	Roles
	Patient
	Hospital
	Doctor
	The patient’s identification
	The doctor’s identification
	Cloud storage server
	Alliance blockchain
	Edge server (local server of hospital)
	Treatment key
	Other auxiliary information
	Department
	Appointment information
	Authorization guarantee
	Ciphertext
	Access time
	Access key
	Repeat mark
	Repeat time
	Access
	Index
	Trapdoor