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Cryptographers’ Track at the RSA Conference

CT-RSA 2014: Topics in Cryptology – CT-RSA 2014 pp 28–47Cite as

An Improved Compression Technique for Signatures Based on Learning with Errors

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Part of the Lecture Notes in Computer Science book series (LNSC,volume 8366)

Abstract

We present a new approach to the compression technique of Lyubashevsky et al. [17,13] for lattice-based signatures based on learning with errors (LWE). Our ideas seem to be particularly suitable for signature schemes whose security, in the random oracle model, is based on standard worst-case computational assumptions. Our signatures are shorter than any previous proposal for provably-secure signatures based on standard lattice problems: at the 128-bit level we improve signature size from (more than) 16500 bits to around 9000 to 12000 bits.

Keywords

  • Lattice-based signatures
  • learning with errors

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Author information

Authors and Affiliations

  1. Department of Mathematics, University of Auckland, New Zealand

    Shi Bai & Steven D. Galbraith

Authors
  1. Shi Bai
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  2. Steven D. Galbraith
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Editors and Affiliations

  1. Microsoft Research, Redmond, WA, USA

    Josh Benaloh

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Bai, S., Galbraith, S.D. (2014). An Improved Compression Technique for Signatures Based on Learning with Errors. In: Benaloh, J. (eds) Topics in Cryptology – CT-RSA 2014. CT-RSA 2014. Lecture Notes in Computer Science, vol 8366. Springer, Cham. https://doi.org/10.1007/978-3-319-04852-9_2

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  • DOI: https://doi.org/10.1007/978-3-319-04852-9_2

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-04851-2

  • Online ISBN: 978-3-319-04852-9

  • eBook Packages: Computer ScienceComputer Science (R0)

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