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Notations used for electronic medical record (EMR) encryption and re-encryption in the proposed system.
| Notation | Description |
| ID | User ID (patient or physician) |
| SK | Private key of the user |
| PK | Public key of the user |
| DEK | Dedicated encryption key to encrypt EMR |
| RK | Re-encryption key |
| Ci | Encrypted EMR |
| Pi | Patienti |
| Di | Doctori |
| AP | Access policy |
| hashi | Hash value of the encrypted EMR |
