Efficient construction of (distributed) verifiable random functions

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We give the first simple and efficient construction of verifiable random functions (VRFs). VRFs, introduced by Micali et al. [13], combine the properties of regular pseudorandom functions (PRFs) (i.e., indistinguishability from a random function) and digital signatures (i.e., one can provide an unforgeable proof that the VRF value is correctly computed). The efficiency of our VRF construction is only slightly worse than that of a regular PRF construction of Naor and Reingold [16]. In contrast to our direct construction, all previous VRF constructions [13, 12] involved an expensive generic transformation from verifiable unpredictable functions (VUFs). We also provide the first construction of distributed VRFs. Our construction is more efficient than the only known construction of distributed (non-verifiable) PRFs [17], but has more applications than the latter. For example, it can be used to distributively implement the random oracle model in a publicly verifiable manner, which by itself has many applications. Our construction is based on a new variant of decisional Diffie-Hellman (DDH) assumption on certain groups where the regular DDH assumption does not hold [10, 9]. Nevertheless, this variant of DDH seems to be plausible based on our current understanding of these groups. We hope that the demonstrated power of our assumption will serve as a motivation for its closer study.

Original languageEnglish (US)
Title of host publicationPublic Key Cryptography - PKC 2003 - 6th International Workshop on Practice and Theory in Public Key Cryptography, Proceedings
EditorsYvo G. Desmedt
PublisherSpringer Verlag
Pages1-17
Number of pages17
ISBN (Print)354000324X, 9783540362883
DOIs
StatePublished - Jan 1 2002
Event6th International Workshop on Practice and Theory in Public Key Cryptography, PKC 2003 - Miami, United States
Duration: Jan 6 2003Jan 8 2003

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume2567
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

Other6th International Workshop on Practice and Theory in Public Key Cryptography, PKC 2003
CountryUnited States
CityMiami
Period1/6/031/8/03

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ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

Cite this

Dodis, Y. (2002). Efficient construction of (distributed) verifiable random functions. In Y. G. Desmedt (Ed.), Public Key Cryptography - PKC 2003 - 6th International Workshop on Practice and Theory in Public Key Cryptography, Proceedings (pp. 1-17). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 2567). Springer Verlag. https://doi.org/10.1007/3-540-36288-6_1