| Budget Amount *help |
¥3,630,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥630,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥900,000 (Direct Cost: ¥900,000)
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| Research Abstract |
The secret sharing scheme enhances security and safety of secure data by sharing cryptogram among a group. In this research, I showed NP-hardness of the problem transferring cryptograms, called Share Transfer Problem, in secure distributed storage systems, and proposed a method to reduce the Share Transfer Problem into the Steiner Tree Problem. Moreover, I proposed several methods to realize distributed database systems by using the secret sharing scheme.
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