| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
We have developed cryptographic protocols in a distributed environment. The notable feature of proposed protocols is that no interaction among users is required. More concretely, we have developed cryptographic protocols such as NIMPC (Non-Interactive Multi Party Computation), CDSS (Cheating Detectable Secret Sharing), and information theoretically secure authenticated encryption secure against replay attack. Here, NIMPC is a cryptographic primitive which enables users to evaluate any function with input secret information of users without revealing their secret information. Cheating Detectable Secret Sharing is a variant of secret sharing (a cryptographic protocol for split secret information into pieces (called share) in such a way that no partial information about the secret is revealed unless certain number of pieces are obtained by the adversary) with an extra functionality to detect the presence of forged shares in reconstructing the secret.
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