A group signature scheme with efficient membership revocation for middle-scale groups

Toru Nakanishi, Yuji Sugiyama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper proposes a group signature scheme with efficient membership revocation. Though group signature schemes with efficient membership revocation based on a dynamic accumulator were proposed, the previous schemes force a member to change his secret key whenever he makes a signature. Furthermore, for the modification, the member has to obtain a public membership information of O(lnN) bits, where ln is the length of the RSA modulus and N is the total number of joining members and removed members. In our scheme, the signer needs no modification of his secret, and the public membership information has only K bits, where K is the maximal number of members. Then, for middle-scale groups with the size that is comparable to the RSA modulus size (e.g., up to about 1000 members for 1024 bit RSA modulus), the public membership information is a single small value only, while the signing/verification also remains efficient.

Original languageEnglish
Pages (from-to)1224-1233
Number of pages10
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE88-A
Issue number5
DOIs
Publication statusPublished - Jan 1 2005

Keywords

  • Group signature
  • Membership revocation
  • Strong RSA assumption

ASJC Scopus subject areas

  • Signal Processing
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering
  • Applied Mathematics

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