| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Outline of Final Research Achievements |
In this research project, we aimed to propose efficient and useful homomorphic encryption schemes and to apply them to real-world society. We first proposed an outsourced private function evaluation scheme with privacy policy enforcement with the help of homomorphic encryption. This scheme makes the data providers control the eligibility who can conduct the functional evaluation and obtain the decryption results. Implementation results show that the communication and computation overhead introduced by our privacy policy enforcement is very small. We also proposed a mis-operation resistant searchable encryption scheme, which enables the receivers to recognize a mis-operation happens in the evaluation phase. Furthermore, we also proposed subset space membership encryption, private information retrieval and searchable encryption as a sub-research project.
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