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Relaxed Two-to-One Recoding Schemes

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Security and Cryptography for Networks (SCN 2014)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 8642))

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Abstract

A two-to-one recoding (TOR) scheme is a new cryptographic primitive, proposed in the recent work of Gorbunov, Vaikuntanathan, and Wee (GVW), as a means to construct attribute-based encryption (ABE) schemes for all boolean circuits. GVW show that TOR schemes can be constructed assuming the hardness of the learning-with-errors (LWE) problem.

We propose a slightly weaker variant of TOR schemes called correlation-relaxed two-to-one recoding (CR-TOR). Unlike the TOR schemes, our weaker variant does not require an encoding function to be pseudorandom on correlated inputs. We instead replace it with an indistinguishability property that states a ciphertext is hard to decrypt without access to a certain encoding. The primary benefit of this relaxation is that it allows the construction of ABE for circuits using the TOR paradigm from a broader class of cryptographic assumptions.

We show how to construct a CR-TOR scheme from the noisy cryptographic multilinear maps of Garg, Gentry, and Halevi as well as those of Coron, Lepoint, and Tibouchi. Our framework leads to an instantiation of ABE for circuits that is conceptually different from the existing constructions.

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Authors and Affiliations

  1. University of Illinois, Urbana-Champaign, USA

    Omkant Pandey

  2. University of Texas, Austin, USA

    Kim Ramchen & Brent Waters

Authors
  1. Omkant Pandey
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  2. Kim Ramchen
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  3. Brent Waters
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Editor information

Editors and Affiliations

  1. École Normale Supérieure & CNRS, 45 rue d’Ulm, 75005, Paris, France

    Michel Abdalla

  2. Dipartimento di Informatica, Università di Salerno, via Ponte don Melillo, 84084, Fisciano, Italy

    Roberto De Prisco

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Pandey, O., Ramchen, K., Waters, B. (2014). Relaxed Two-to-One Recoding Schemes. In: Abdalla, M., De Prisco, R. (eds) Security and Cryptography for Networks. SCN 2014. Lecture Notes in Computer Science, vol 8642. Springer, Cham. https://doi.org/10.1007/978-3-319-10879-7_4

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  • DOI: https://doi.org/10.1007/978-3-319-10879-7_4

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-10878-0

  • Online ISBN: 978-3-319-10879-7

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