Concurrent Zero-Knowledge

With Additional Background by Oded Goldreich

  • Alon Rosen

Part of the Information Security and Cryptography book series (ISC)

About this book

Introduction

Zero-knowledge proofs are fascinating and extremely useful constructs. Their fascinating nature is due to their seemingly contradictory de?nition; ze- knowledge proofs are convincing and yet yield nothing beyond the validity of the assertion being proved. Their applicability in the domain of cryptography is vast; they are typically used to force malicious parties to behave according to a predetermined protocol. In addition to their direct applicability in cr- tography, zero-knowledge proofs serve as a good benchmark for the study of variousproblemsregardingcryptographicprotocols(e.g.,“securecomposition of protocols”). A fundamental question regarding zero-knowledge protocols refers to the preservation of security (i.e., of the zero-knowledge feature) when many - stances are executed concurrently, and in particular under a purely as- chronous model. The practical importance of this question, in the days of extensive Internet communication, seems clear. It turned out that this qu- tion is also very interesting from a theoretical point of view. In particular, this question served as a benchmark for the study of the security of concurrent executions of protocols and led to the development of techniques for coping with the problems that arise in that setting.

Keywords

Black-box simulation Concurrent zero-knowledge Protocol security Zero-knowledge Zero-knowledge proof systems algorithms communication cryptography

Authors and affiliations

  • Alon Rosen
    • 1
  1. 1.Harvard University DEASCambridgeUSA

Bibliographic information

  • DOI https://doi.org/10.1007/3-540-32939-0
  • Copyright Information Springer-Verlag Berlin Heidelberg 2006
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Computer Science
  • Print ISBN 978-3-540-32938-1
  • Online ISBN 978-3-540-32939-8
  • Series Print ISSN 1619-7100
  • About this book