You are looking at a specific version 20190306:123813 of this paper. See the latest version.

Paper 2019/196

Ring Signatures: Logarithmic-Size, No Setup --- from Standard Assumptions

Michael Backes and Nico Döttling and Lucjan Hanzlik and Kamil Kluczniak and Jonas Schneider

Abstract

Ring signatures allow for creating signatures on behalf of an ad hoc group of signers, hiding the true identity of the signer among the group. A natural goal is to construct a ring signature scheme for which the signature size is short in the number of ring members. Moreover, such a construction should not rely on a trusted setup and be proven secure under falsifiable standard assumptions. Despite many years of research this question is still open. In this paper, we present the first construction of logarithmic-size ring signatures which do not rely on a trusted setup or the random oracle heuristic. Specifically, our scheme can be instantiated from standard assumptions and the size of signatures grows only logarithmically in the number of ring members. We also extend our techniques to the setting of linkable ring signatures, where signatures created using the same signing key can be linked.

Metadata
Available format(s)
PDF
Publication info
A major revision of an IACR publication in EUROCRYPT 2019
Keywords
ring signatureslinkable ring signaturesstandard model
Contact author(s)
jonas schneider-bensch @ cispa-helmholtz de
History
2019-03-06: last of 2 revisions
2019-02-27: received
See all versions
Short URL
https://ia.cr/2019/196
License
Creative Commons Attribution
CC BY
Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.