| Presentation | 2012-09-21 Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption Tatsuaki OKAMOTO, Katsuyuki TAKASHIMA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In [1], we proposed the first inner product encryption (IPE) scheme that is adaptively secure and fully attribute-hiding (attribute-hiding in the sense of the definition by Katz, Sahai and Waters), while the existing IPE schemes are either fully attribute-hiding but selectively secure or adaptively secure but weakly attribute-hiding. The proposed IPE scheme is proven to be adaptively secure and fully attribute-hiding under the decisional linear assumption in the standard model. The IPE scheme is comparably as efficient as the existing attribute-hiding IPE schemes. We also presented a variant of the proposed IPE scheme with the same security that achieves shorter public and secret keys. A hierarchical IPE scheme can be constructed that is also adaptively secure and fully attribute-hiding under the same assumption. In this work, we extended the dual system encryption technique by Waters into a more general manner, in which new forms of ciphertext and secret keys are employed and new types of information theoretical tricks are introduced along with several forms of computational reduction. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | functional encryption / predicate encryption / inner product predicate |
| Paper # | ISEC2012-52 |
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| Committee | ISEC |
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| Conference Date | 2012/9/14(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption |
| Sub Title (in English) | |
| Keyword(1) | functional encryption |
| Keyword(2) | predicate encryption |
| Keyword(3) | inner product predicate |
| 1st Author's Name | Tatsuaki OKAMOTO |
| 1st Author's Affiliation | Secure Platform Laboratories() |
| 2nd Author's Name | Katsuyuki TAKASHIMA |
| 2nd Author's Affiliation | Information Technology R&D Cente |
| Date | 2012-09-21 |
| Paper # | ISEC2012-52 |
| Volume (vol) | vol.112 |
| Number (no) | 211 |
| Page | pp.pp.- |
| #Pages | 38 |
| Date of Issue | |