Open Access
Table 1
Notations table
| Symbol | Description |
|---|---|
| CS | The cloud server |
| FSj | The j-th fog server |
| EUi, MDi | i-th edge user and his/her smart device |
| IDi, IDj | The identity of EUi, FSj, respectively |
| PWi, BIOi | i-th edge user's password and biometric |
| Gen(·), Rep(·) | Fuzzy generation and reproduction function |
| σi, τi | Biometric secret key and Public reproduction parameter |
| TIDi, TIDj | The pseudonym of EUi and FSj, respectively |
| Kcf, Kcu | The long-term secret keys chosen by CS |
| MK | The master secret key of CS |
| nu, nf | 160-bit random secret number of EUi |
| rc, rf, ru | 128-bit random number of CS, FSj and EUi, respectively |
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