Abstract
Privacy-preserving big data analysis on cloud systems is becoming increasingly indispensable as the amount of information of the individuals is accumulated on our database system. As a way of maintaining security on cloud system, Homomorphic Encryption (HE) is considered to be theoretically eminent protecting against privacy leakage. However, insufficient number of operations on HE are developed, hindering many research developers to apply their knowledgeable techniques on this field. Therefore, we propose a novel approach in constructing logarithm function based on mathematical theorem of Taylor expansion with fundamental arithmetic operations and basic gate operations in usage. Moreover, we present a more accurate way of deriving answers for logarithm using square and shift method.
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Acknowledgement
This research was supported by the MSIP (Ministry of Science, ICT & Future Planning), Korea, under the IITP (Institute for Information & communications Technology Promotion) support program (2017-0-00545).
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Yoo, J.S., Song, B.K., Yoon, J.W. (2019). Logarithm Design on Encrypted Data with Bitwise Operation. In: Kang, B., Jang, J. (eds) Information Security Applications. WISA 2018. Lecture Notes in Computer Science(), vol 11402. Springer, Cham. https://doi.org/10.1007/978-3-030-17982-3_9
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DOI: https://doi.org/10.1007/978-3-030-17982-3_9
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