Name
Abstract | ||
|---|---|---|
Inner product functional encryption (IPFE) is a subclass of functional encryption (FE), whose function class is limited to inner product. We construct an efficient private-key IPFE scheme with full-hiding security, where confidentiality is assured for not only encrypted data but also functions associated with secret keys. Recently, Datta et al. presented such a scheme in PKC 2016 and this is the only scheme that achieves full-hiding security. Our scheme has an advantage over their scheme for the two aspects. More efficient: keys and ciphertexts of our scheme are almost half the size of those of their scheme. Weaker assumption: our scheme is secure under the k-linear (k-Lin) assumption, while their scheme is secure under a stronger assumption, namely, the symmetric external Diffie-Hellman (SXDH) assumption. It is well-known that the k-Lin assumption is equivalent to the SXDH assumption when k = 1 and becomes weak as k increases. |
Year | DOI | Venue |
|---|---|---|
2020 | 10.1587/transfun.2019CIP0003 | IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES |
Keywords | Field | DocType |
functional encryption, inner product, function privacy, pairing | Functional encryption,Theoretical computer science,Mathematics | Journal |
Volume | Issue | ISSN |
E103A | 1 | 0916-8508 |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Junichi Tomida | 1 | 0 | 1.69 |
| Masayuki Abe | 2 | 1335 | 68.58 |
| Tatsuaki Okamoto | 3 | 5408 | 521.96 |