A Lightweight and Secure Anonymous User Authentication Protocol for Wireless Body Area Networks

Table 5

Execution time of the related pairing-based operations.

Schemes	Time of generating the certificate	Time of verifying the certificate
Wu et al.’s scheme	3Th + 4Tmul + Ten	4Th + 4Tmul + Tpair + Ten
Shen et al.’s scheme	Th + 3Tmul	Th + 4Tpair + Ten + 2Tmul
Das et al.’s scheme	5Th + 2Ten	4Th + 2Ten
Liu et al.’s scheme	2Tpair + 3Th + Tmul	3Tpair + 3Th + 3Tmul
Proposed scheme	Th + Tmul + Tpair	Th + 2Tmul + Tpair