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

Table 3

Communication cost.

	Shi [13]	Choi [14]	Xue [17]	Kumar [19]	Our protocol
Total communication cost (bits)	2656	3040	2144	1792	1664
Communication cost of sensor devices (bits)	2656	3040	1440	800	832
Sensor device cost (%)	100	100	67.16	44.64	50