Identity Based Threshold Ring Signature

Sherman S. M.  Chow; Lucas C. K.  Hui; S. M.  Yiu

Paper 2004/179

Identity Based Threshold Ring Signature

Sherman S. M. Chow, Lucas C. K. Hui, and S. M. Yiu

Abstract

In threshold ring signature schemes, any group of $t$ entities spontaneously conscripting arbitrarily $n - t$ entities to generate a publicly verifiable $t$ -out-of- $n$ signature on behalf of the whole group, yet the actual signers remain anonymous. The spontaneity of these schemes is desirable for ad-hoc groups such as mobile ad-hoc networks. In this paper, we present an identity based (ID-based) threshold ring signature scheme. The scheme is provably secure in the random oracle model and provides trusted authority compatibility. To the best of authors' knowledge, our scheme is the first ID-based threshold ring signature scheme which is also the most efficient (in terms of number of pairing operations required) ID-based ring signature scheme (when $t = 1$ ) and threshold ring signature scheme from pairings.

Note: An appendix about related concurrent work is added.

Metadata

Available format(s): PDF PS
Category: Public-key cryptography
Publication info: Published elsewhere. ICISC 2004, To Appear
Keywords: Threshold ring signature identity-based signature bilinear pairings anonymity spontaneity
Contact author(s): smchow @ cs hku hk
History: 2005-02-02: last of 14 revisions; 2004-07-26: received; See all versions
Short URL: https://ia.cr/2004/179
License: CC BY

BibTeX

@misc{cryptoeprint:2004/179,
      author = {Sherman S. M.  Chow and Lucas C. K.  Hui and S. M.  Yiu},
      title = {Identity Based Threshold Ring Signature},
      howpublished = {Cryptology {ePrint} Archive, Paper 2004/179},
      year = {2004},
      url = {https://eprint.iacr.org/2004/179}
}