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- W2920656144 abstract "This paper shows how to obfuscate several simple functionalities from a new Knowledge of OrthogonALity Assumption (KOALA) in cyclic groups which is shown to hold in the Generic Group Model. Specifically, we give simpler and stronger security proofs for obfuscation schemes for point functions, general-output point functions and pattern matching with wildcards. We also revisit the work of Bishop et al. (CRYPTO 2018) on obfuscating the pattern matching with wildcards functionality. We improve upon the construction and the analysis in several ways: We obtain our results by first obfuscating a simpler “big subset functionality”, for which we establish full virtual black-box security; this yields a simpler and more modular analysis for pattern matching. Finally, we extend our distinguishing attacks to a large class of simple linear-in-the-exponent schemes." @default.
- W2920656144 created "2019-03-11" @default.
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- W2920656144 date "2019-01-01" @default.
- W2920656144 modified "2023-10-16" @default.
- W2920656144 title "Obfuscating Simple Functionalities from Knowledge Assumptions" @default.
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- W2920656144 doi "https://doi.org/10.1007/978-3-030-17259-6_9" @default.
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