RingCT 2.0: A compact accumulator-based (linkable ring signature) protocol for blockchain cryptocurrency Monero

Shi Feng Sun, Man Ho Allen Au, Joseph K. Liu, Tsz Hon Yuen

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

71 Citations (Scopus)

Abstract

In this work, we initially study the necessary properties and security requirements of Ring Confidential Transaction (RingCT) protocol deployed in the popular anonymous cryptocurrency Monero. Firstly, we formalize the syntax of RingCT protocol and present several formal security definitions according to its application in Monero. Based on our observations on the underlying (linkable) ring signature and commitment schemes, we then put forward a new efficient RingCT protocol (RingCT 2.0), which is built upon the well-known Pedersen commitment, accumulator with one-way domain and signature of knowledge (which altogether perform the functions of a linkable ring signature). Besides, we show that it satisfies the security requirements if the underlying building blocks are secure in the random oracle model. In comparison with the original RingCT protocol, our RingCT 2.0 protocol presents a significant space saving, namely, the transaction size is independent of the number of groups of input accounts included in the generalized ring while the original RingCT suffers a linear growth with the number of groups, which would allow each block to process more transactions.
Original languageEnglish
Title of host publicationComputer Security – ESORICS 2017 - 22nd European Symposium on Research in Computer Security, Proceedings
PublisherSpringer Verlag
Pages456-474
Number of pages19
ISBN (Print)9783319663982
DOIs
Publication statusPublished - 1 Jan 2017
Event22nd European Symposium on Research in Computer Security, ESORICS 2017 - Oslo, Norway
Duration: 11 Sep 201715 Sep 2017

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume10493 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference22nd European Symposium on Research in Computer Security, ESORICS 2017
CountryNorway
CityOslo
Period11/09/1715/09/17

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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