| Project/Area Number |
16K00187
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Information security
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Research Collaborator |
NOGAMI Yasuyuki
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 高機能暗号 / プライバシー保護 / 検索可能暗号 / 暗号状態計算 / レピュテーション / 匿名認証 / 暗号・認証等 |
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| Outline of Final Research Achievements |
In cloud computing, a server can reveal some information, and thus high-functional cryptosystems have been intensively researched, which has higher functions than conventional cryptosystems. However, in searchable encryptions of high-functional cryptosystems, there is a security problem that a server can guess searched keywords. On the other hand, a verification scheme to check encrypted computations has been proposed, but it needs lots of public parameters. In this research, we propose a searchable encryption secure against the keyword-guessing attack. Additionally, we propose a verification scheme for encrypted computations where public parameters are greatly reduced, and apply it to reputation systems.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の学術的意義は、従来の方式では実現できていなかった，クラウド環境における検索可能暗号の新しい安全性の実現，および暗号状態計算検証における公開パラメータサイズの削減である．さらに，方式提案だけではなく，安全性保証とともに，プライバシー保護技術への応用や実装も意義があるといえる．本研究により，安全性と効率性を両立したクラウドコンピュティングの実現が可能となると考える．
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