Table 1 Notations.
Symbol | Description |
|---|---|
GWk | Gateway node k |
SNj | Sensor node j |
MDi | User’s mobile device i |
n | Secret key for GWk |
Pk | Public key for GWk |
Mk | Master key for GWk |
SNIDj | Unique identity for sensor node j |
KGS | Secret key shared between GWk and SNj |
Ui | User i |
UIDi | Unique identity for user i |
PWi | Password for user i |
SKS | Session key derived at SNj |
SKG | Session key derived at the GWk |
SKD | Session key derived at the MDi |
h (.) | One-way hashing function |
|| | Concatenation operation |
 ⊕  | XOR operation |
