Fig 1.
Wireless sensor networks.
Table 1.
Notation definitions.
Fig 2.
Registration phase for users in the proposed scheme.
Fig 3.
Registration phase for sensor nodes in the proposed scheme.
Fig 4.
Login phase; authentication and key agreement phase.
Fig 5.
Password change phase in the proposed scheme (Ui can update the password without requiring the communication with the GWN and Sj).
Table 2.
Notations of BAN logic.
Table 3.
Functionality comparison of our scheme with other related schemes.
Table 4.
Performance comparison of our scheme with other related schemes.
Fig 6.
Comparison of running time.
Fig 7.
Comparison of energy consumption.