From: A multi-gateway authentication and key-agreement scheme on wireless sensor networks for IoT
Ui | The user i |
Sj | The sensor j |
GW | Gateway |
IDi | The identity of user i |
PWi | The password of user i |
PIDi | The pseudo identity of user i |
SIDj | The identity of sensor j |
kGWN | A long-term secret key of the gateway |
KG | A secret key between the gateway and sensor |
Rl | A random number generated by the participant l |
Nl | A nonce generated by the participant l |
SK | The session key |
h(∙) | A secure one-way hash function |
‖ | The concatenation operation |
⊕ | The exclusive-or (XOR) operation |