| Project/Area Number |
24740078
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
General mathematics (including Probability theory/Statistical mathematics)
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| Research Institution | Institute of Systems, Information Technologies and Nanotechnologies |
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Principal Investigator |
YASUDA Takanori 公益財団法人九州先端科学技術研究所, その他部局等, 研究員 (00464602)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKAGI Tsuyoshi 九州大学, マスフォアインダストリ研究所, 教授 (60404802)
SAKURAI Kouichi 九州大学, システム情報科学研究院, 教授 (60264066)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 公開鍵暗号 / ポスト量子暗号 / 多変数多項式公開鍵暗号 |
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| Outline of Final Research Achievements |
Multivariate public key cryptosystems (MPKC) can resist attacks using quantum computer, and have efficient encryption and decryption. On the other hand, there is a problem that MPKC have huge key size. Therefore, I apply non-commutative rings to MPKC, which originally are designed using commutative rings and fields, and propose a method to reduce key size of MPKC. In comparison with the original scheme in MPKC, my scheme can reduce key size by about 80%. Moreover, I analyze its security and present how to select suitable parameters.
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