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Explainable Arguments

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Financial Cryptography and Data Security (FC 2022)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 13411))

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Abstract

We introduce an intriguing new type of argument systems with the additional property of being explainable. Intuitively by explainable, we mean that given any argument under a statement, and any witness, we can produce the random coins for which the \(\textsf{Prove}\) algorithm outputs the same bits of the argument.

This work aims at introducing the foundations for the interactive as well as the non-interactive setting. We show how to build explainable arguments from witness encryption and indistinguishability obfuscation. Finally, we show applications of explainable arguments. Notably we construct deniable chosen-ciphertext secure encryption. Previous deniable encryption scheme achieved only chosen plaintext security.

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Acknowledgements

This work has been partially funded/supported by the German Ministry for Education and Research through funding for the project CISPA-Stanford Center for Cybersecurity (Funding numbers: 16KIS0762 and 16KIS0927).

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Authors and Affiliations

  1. CISPA Helmholtz Center for Information Security, Saarbrücken, Germany

    Lucjan Hanzlik & Kamil Kluczniak

  2. Stanford University, Stanford, USA

    Kamil Kluczniak

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  1. Lucjan Hanzlik
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  1. Technion - Israel Institute of Technology, Haifa, Israel

    Ittay Eyal

  2. Texas A&M University, College Station, TX, USA

    Juan Garay

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Hanzlik, L., Kluczniak, K. (2022). Explainable Arguments. In: Eyal, I., Garay, J. (eds) Financial Cryptography and Data Security. FC 2022. Lecture Notes in Computer Science, vol 13411. Springer, Cham. https://doi.org/10.1007/978-3-031-18283-9_4

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