Secure multiparty computations using a dial lock

  • Authors:
  • Takaaki Mizuki;Yoshinori Kugimoto;Hideaki Sone

  • Affiliations:
  • Information Synergy Center, Tohoku University, Sendai, Japan;Sone Lab., Graduate School of Information Sciences, Tohoku University, Sendai, Japan;Information Synergy Center, Tohoku University, Sendai, Japan

  • Venue:
  • TAMC'07 Proceedings of the 4th international conference on Theory and applications of models of computation
  • Year:
  • 2007

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Abstract

This paper first explores the power of the dial locks (also called the combination locks), which are physical handy devices, in designing cryptographic protocols. Specifically, we design protocols for secure multiparty computations using the dial locks, and give some conditions for a Boolean function to be or not to be securely computable by a dial lock, i.e., to be or not to be "dial-computable." In particular, we exhibit simple necessary and sufficient conditions for a symmetric function to be dial-computable.