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Comparison of the proposed scheme.
| Scheme | Kim and Lee | Proposed | |
|---|---|---|---|
| Item | |||
| Provable Security | X | √ | |
| Cryptographic Assumption | Unknown | BIDHP | |
| Public Information | {G, GT, e, g, q, H} | {G1, G2, e, g, q, h1, h2} | |
| Computation Complexity | 4TB + 6TE | 2TB + 6TE | |
| Amount of Sharing * | O(n) | O(n) | |
* Remark: The symbol n is the number of data-sharing nodes while (TB, TE) separately denotes the time for bilinear pairing and exponentiation.
