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Adding Distributed Decryption and Key Generation to a Ring-LWE Based CCA Encryption Scheme

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Information Security and Privacy (ACISP 2019)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 11547))

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Abstract

We show how to build distributed key generation and distributed decryption procedures for the \(\textsf {LIMA} \) Ring-LWE based post-quantum cryptosystem. Our protocols implement the CCA variants of distributed decryption and are actively secure (with abort) in the case of three parties and honest majority. Our protocols make use of a combination of problem specific MPC protocols, generic garbled circuit based MPC and generic Linear Secret Sharing based MPC. We also, as a by-product, report on the first run-times for the execution of the SHA-3 function in an MPC system.

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Acknowledgements

This work has been supported in part by ERC Advanced Grant ERC-2015-AdG-IMPaCT and by the Defense Advanced Research Projects Agency (DARPA) and Space and Naval Warfare Systems Center, Pacific (SSC Pacific) under contract No. N66001-15-C-4070, and by the FWO under an Odysseus project GOH9718N.

Author information

Authors and Affiliations

  1. Bar-Ilan University, Ramat Gan, Israel

    Yehuda Lindell

  2. KU Leuven, Leuven, Belgium

    Nigel P. Smart & Younes Talibi Alaoui

  3. Unbound Technology, Petah Tikva, Israel

    Michael Kraitsberg, Yehuda Lindell & Valery Osheter

  4. University of Bristol, Bristol, UK

    Nigel P. Smart

Authors
  1. Michael Kraitsberg
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  2. Yehuda Lindell
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  3. Valery Osheter
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  4. Nigel P. Smart
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  5. Younes Talibi Alaoui
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Corresponding author

Correspondence to Nigel P. Smart .

Editor information

Editors and Affiliations

  1. Massey University, Palmerston North, New Zealand

    Julian Jang-Jaccard

  2. University of Wollongong, Wollongong, NSW, Australia

    Fuchun Guo

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Kraitsberg, M., Lindell, Y., Osheter, V., Smart, N.P., Talibi Alaoui, Y. (2019). Adding Distributed Decryption and Key Generation to a Ring-LWE Based CCA Encryption Scheme. In: Jang-Jaccard, J., Guo, F. (eds) Information Security and Privacy. ACISP 2019. Lecture Notes in Computer Science(), vol 11547. Springer, Cham. https://doi.org/10.1007/978-3-030-21548-4_11

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  • DOI: https://doi.org/10.1007/978-3-030-21548-4_11

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-21547-7

  • Online ISBN: 978-3-030-21548-4

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