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Erschienen in:
2019 | OriginalPaper | Buchkapitel
Logarithm Design on Encrypted Data with Bitwise Operation
verfasst von : Joon Soo Yoo, Baek Kyung Song, Ji Won Yoon
Erschienen in: Information Security Applications
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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.