An Anonymous Authentication Protocol Based on Cloud for Telemedical Systems

Table 2

Comparisons of computation loading.

		Chen et al.’s [15]	Chiou et al.’s [16]	Cheng et al.’s [20]	Ours
HUP	H	++2+2++3	+2+2+4	2+2+4++
	C
PUP	P	++2+2+2+3	+3+2+7	3+2+6++
	C
TP	D	2+2+2+3+3	2+2+2+4		5+4+2+2
	C	2+2++3			4+2+2
CP	P	N/A	++2+4	++2+4	6+4+2+
	C	N/A	+4	+4	4+2+2

HUP: healthcare center uploading phase.
PUP: patient uploading phase.
TP: treatment phase.
CP: checking report phase.
: time consumption for executing a hash function.
: time consumption for executing the symmetric encryption/decryption operation.
: time consumption for executing a modular exponent operation.
: time consumption for executing a bilinear pairing operation.
: time consumption for executing/verifying a signature.
: time consumption for executing an asymmetric encryption/decryption operation.
: time consumption for executing a multiplication operation.