Blockchain-Based Efficient Device Authentication Protocol for Medical Cyber-Physical Systems

Table 1

Symbols and definitions.

Symbol	Description
	Blockchain center
	Smart card
	User (medical staff)
	of The user
	Password of user
	Gateway
	Gateway node identifier
	The sensor device node
	Identifier of the sensor device node
	Shared key of sensor device and gateway node
	Session key
	Connection operation
	Exclusive or operation