[Resource Topic] 2023/536: Lightweight Asynchronous Verifiable Secret Sharing with Optimal Resilience

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Title:
Lightweight Asynchronous Verifiable Secret Sharing with Optimal Resilience

Authors: Victor Shoup, Nigel P. Smart

Abstract:

We present new protocols for Asynchronous Verifiable Secret Sharing for Shamir (i.e., threshold t< n/3 corruptions, where n is the total number of parties;

  • Are complete, in the sense that they guarantee that if any honest party receives their share then all honest parties receive their shares;
  • Employ batching techniques, whereby a dealer shares many secrets in parallel, and achieves an amortized communication complexity that is linear in n, at least on the “happy path”, where no party provably misbehaves.

ePrint: https://eprint.iacr.org/2023/536

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