2023 Fiscal Year Final Research Report
Research on Cryptographic Schemes with Probabilistically Decryptable Encryption Scheme
| Project/Area Number |
23K19952
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
1001:Information science, computer engineering, and related fields
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2023-08-31 – 2024-03-31
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| Keywords | 情報セキュリティ / 暗号 / ブロックチェーン |
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| Outline of Final Research Achievements |
In this research, I have developed a new cryptographic scheme where decryption is possible only with a predetermined probability. Specifically, I have developed existing cryptographic techniques such as Verifiable Secret Sharing and Commited Oblivious Transfer and considered a mechanism to verify that the ciphertext was properly created by the decrypter so that the encrypter cannot cheat. As a result of our research, I participated in a symposium in Japan and presented our cryptographic scheme, "Oblivious Encryption."
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| Free Research Field |
情報セキュリティ
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，復号を確率的に制御可能な，新しいタイプの暗号スキームの開発を行ってきた．従来，暗号では適切な鍵を持つ参加者は確率1で復号を行うことが可能である．本研究は，事前に合意された確率でのみ復号を可能とする．本提案手法を利用することで，強いプライバシーが求められる電子マネーにおいて，マネーロンダリング等の犯罪を，確率的に操作可能にすることや，新たなデータ共有基盤の構築を可能とする．
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