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Tagged One-Time Signatures: Tight Security and Optimal Tag Size

  • Masayuki Abe
  • Bernardo David
  • Markulf Kohlweiss
  • Ryo Nishimaki
  • Miyako Ohkubo
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7778)

Abstract

We present an efficient structure-preserving tagged one-time signature scheme with tight security reductions to the decision-linear assumption. Our scheme features short tags consisting of a single group element and gives rise to the currently most efficient structure-preserving signature scheme based on the decision-liner assumption with constant-size signatures of only 14 group elements, where the record-so-far was 17 elements.

To demonstrate the advantages of our scheme, we revisit the work by Hofheinz and Jager (CRYPTO 2012) and present the currently most efficient tightly secure public-key encryption scheme. We also obtain the first structure-preserving public-key encryption scheme featuring both tight security and public verifiability.

Keywords

Tagged One-Time Signatures Structure-Preserving Signatures Tight Security Reduction Decision Linear Assumption 

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Copyright information

© International Association for Cryptologic Research 2013

Authors and Affiliations

  • Masayuki Abe
    • 1
  • Bernardo David
    • 2
  • Markulf Kohlweiss
    • 3
  • Ryo Nishimaki
    • 1
  • Miyako Ohkubo
    • 4
  1. 1.NTT Secure Platform LaboratoriesJapan
  2. 2.University of BrasiliaBrazil
  3. 3.Microsoft ResearchCambridgeUK
  4. 4.Security Architecture Laboratory, NSRINICTJapan

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