Name
Abstract | ||
|---|---|---|
Weng et al. introduced the notion of conditional proxy re-encryption (C-PRE), whereby only the ciphertext satisfying one condition set by Alice can be re-encrypted by the proxy. To achieve more fine-grained delegation on the condition set, we introduce a new cryptographic primitive called fuzzy conditional proxy re-encryption (FC-PRE) in which we view conditions in C-PRE as a set of descriptive keywords. A FC-PRE scheme allows for a proxy with the re-encryption key for a conditional keyword set, W, to re-encrypt a ciphertext encrypted with a conditional keyword set, W′, if and only if W and W′ are close to each other as measured by the “set overlap” distance metric. Therefore, our system allows a certain amount of error-tolerance in the conditions. We formalize the FC-PRE security model by incorporating the advantages in previous C-PRE. Finally, we present an efficient construction of FC-PRE scheme, and prove its CCA-security under the well-studied decisional bilinear Diffie-Hellman (DBDH) assumption in the random oracle model. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1007/s11432-012-4623-6 | SCIENCE CHINA Information Sciences |
Keywords | DocType | Volume |
proxy re-encryption, fuzzy conditional proxy re-encryption, chosen-ciphertext security | Journal | 56 |
Issue | ISSN | Citations |
5 | 1869-1919 | 6 |
PageRank | References | Authors |
0.46 | 18 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Liming Fang | 1 | 323 | 28.85 |
| Jiandong Wang | 2 | 302 | 22.28 |
| Chunpeng Ge | 3 | 176 | 16.69 |
| Yongjun Ren | 4 | 27 | 4.45 |