An Efficient Three-Party Authentication Scheme for Data Exchange in Medical Environment

Table 1

Comparison of computation and communication costs with verifier-based 3PAKA schemes without server public keys.

	Lee et al.’s scheme [8]			Wang-Mo’s scheme [9]			Kwon et al.’s scheme [10]			Lin-Lee’s scheme [7]			Our scheme
	Exponentiation	3	4	4	4	4	6	4	4	10	4	4	6	1	1	0
X-or	1	1	2	1	1	2	0	0	0	1	1	2	0	0	0
Multip./division	0	0	0	0	0	0	3	3	4	0	0	0	0	0	0
Random number	1	1	2	1	1	2	1	1	4	1	1	2	0	0	0
Hash	3	3	4	3	3	4	3	3	4	4	4	4	1	0	1
Encryption/decryption	0	0	0	0	0	0	0	0	0	0	0	0	4	4	2
Transmission messages	3	6	4	3	6	4	3	10	3	6	7	4	4	2	3
Transmission rounds	2	3	4	2	3	4	2	4	2	4	4	4	2	2	2