| Project/Area Number |
18H05237
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Review Section |
Broad Section C
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| Research Institution | Hokkaido University |
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Principal Investigator |
TOMITA Akihisa 北海道大学, 情報科学研究院, 教授 (60501434)
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| Co-Investigator(Kenkyū-buntansha) |
平野 琢也 学習院大学, 理学部, 教授 (00251330)
玉木 潔 富山大学, 学術研究部工学系, 教授 (20435928)
藤原 幹生 国立研究開発法人情報通信研究機構, 量子ICT協創センター, 研究センター長 (70359066)
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| Project Period (FY) |
2018-06-11 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥192,660,000 (Direct Cost: ¥148,200,000、Indirect Cost: ¥44,460,000)
Fiscal Year 2022: ¥35,360,000 (Direct Cost: ¥27,200,000、Indirect Cost: ¥8,160,000)
Fiscal Year 2021: ¥38,090,000 (Direct Cost: ¥29,300,000、Indirect Cost: ¥8,790,000)
Fiscal Year 2020: ¥43,290,000 (Direct Cost: ¥33,300,000、Indirect Cost: ¥9,990,000)
Fiscal Year 2019: ¥43,810,000 (Direct Cost: ¥33,700,000、Indirect Cost: ¥10,110,000)
Fiscal Year 2018: ¥32,110,000 (Direct Cost: ¥24,700,000、Indirect Cost: ¥7,410,000)
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| Keywords | 量子暗号 / 秘密分散 / 情報通信ネットワーク / 情報通信ネットワーク基盤 / 情報理論的安全 / 量子鍵配送 / 量子セキュアネットワーク / 量子暗号鍵配送 / 安全性理論 / 量子暗号ネットワーク / 安全性証明 / 量子通信 / 光制御 / 量子ネットワーク / 安全性保証 |
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| Outline of Final Research Achievements |
This project aims to establish technological fundation of the communication network, where the long-term security is guranteed by integrating integrating information theoretically secure cryptography technology and quantum cryptography. To this end, we conducted research and development of networks for relaying, storing, processing (secure computation), and restoring data in the information theoretically secure manners. We improved the network control technology, data statistical processing technology, as well as quantum key distribution (QKD) technology. We have demonstrated secure data relay on the Tokyo-QKD-Network, by applying secret sharing and QKD. We also established technologies to extend the link distance, to improve key generating speed for continuous-wave QKD, and to realize co-existance with lightwave communication. We also expand security theory on QKD to consider more practical situations. The project has established a next-generation secure network technology.
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| Academic Significance and Societal Importance of the Research Achievements |
ヒトゲノム情報など長期間にわたって秘匿性を保証する必要がある情報について，これまで数十年から百年以上安全に伝送，保管，処理する技術は知られていなかった．本プロジェクトは情報理論的安全なプロトコルを活用し，これと量子暗号鍵配送によって共有される乱数鍵を組み合わせることによって長期間の安全性を保証する量子セキュアネットワークを実現する技術を開発した．同時に，量子暗号鍵配送をネットワークの要求に応えるために高度化する技術も開発し，長距離化，高速化するための学理と技術を明らかにした．さらに，より現実的な状況でも安全性を解析できる安全性証明の理論的な拡張にも成功した．
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| Assessment Rating |
Ex-post Assessment Comments (Rating)
A-: In light of the aim of introducing the research area into the research categories, expected outcomes of research have been produced on the whole though the progress in a part of the research has been delayed.
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Assessment Rating |
Interim Assessment Comments (Rating)
A-: In light of the aim of introducing the research area into the research categories, the expected progress in research has been made on the whole though a part of it has been delayed.
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