A Verifiable Secret Sharing Scheme Based on the Chinese Remainder Theorem

  • Authors:
  • Kamer Kaya;Ali Aydın Selçuk

  • Affiliations:
  • Department of Computer Engineering, Bilkent University, Ankara, Turkey 06800;Department of Computer Engineering, Bilkent University, Ankara, Turkey 06800

  • Venue:
  • INDOCRYPT '08 Proceedings of the 9th International Conference on Cryptology in India: Progress in Cryptology
  • Year:
  • 2008

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Abstract

In this paper, we investigate how to achieve verifiable secret sharing (VSS) schemes by using the Chinese Remainder Theorem (CRT). We first show that two schemes proposed earlier are not secure by an attack where the dealer is able to distribute inconsistent shares to the users. Then we propose a new VSS scheme based on the CRT and prove its security. Using the proposed VSS scheme, we develop a joint random secret sharing (JRSS) protocol, which, to the best of our knowledge, is the first JRSS protocol based on the CRT.