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- W2169869837 abstract "With the emergence of affordable cloud services, users are currently moving data to external services providers. Hence, they implicitly trust providers to not abuse or lose sensitive data. To protect this data in the context of cloud computing, the use of Order-Preserving Encryption (OPE) has been suggested to encrypt data while still allowing efficient queries. The reference approach builds on Order-Preserving Functions (OPFs) drawn uniformly at random: the so-called ideal object. However, recent results question the suitability of this construction, as its security properties turn out to be poor. In this article, we investigate possible alternatives. For this, we introduce two descriptive metrics rating one-wayness-related properties of OPF construction schemes, i.e., the ability of an adversary to estimate the plaintext when given a ciphertext and possible extra information. Furthermore, we propose three novel approaches to draw OPFs and apply the introduced metrics to study their security features in relation to the ideal object. The results visualize the extent of insecurity caused by using the ideal object and qualify the suitability of the alternative schemes under different threat scenarios." @default.
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- W2169869837 date "2013-11-08" @default.
- W2169869837 modified "2023-10-16" @default.
- W2169869837 title "Beyond the ideal object" @default.
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- W2169869837 doi "https://doi.org/10.1145/2517488.2517496" @default.
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