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Notations.
| Symbol | Description |
|---|---|
| p, q | Two large prime numbers |
| FP | A finite field |
| E | An elliptic curve defined on finite field FP with large order |
| G | The group of elliptic curve points on E |
| IDU | The identity of user U |
| IDSn | The identity of sensor Sn |
| pwU | The user U's password |
| GW | The gateway of WSN |
| x, y | The master keys of GW |
| h(·) | A secure one-way hash function |
| ‖ | A string concatenation operation |
| ⊕ | A bitwise XOR operation |
