Solutions to Key Exposure Problem in Ring Signature

Joseph K.  Liu; Duncan S.  Wong

Paper 2005/427

Solutions to Key Exposure Problem in Ring Signature

Joseph K. Liu and Duncan S. Wong

Abstract

In this paper, we suggest solutions to the key exposure problem in ring signature. In particular, we propose the first forward secure ring signature scheme and the first key-insulated ring signature schemes. Both constructions allow a $(t, n)$ -threshold setting. That is, even $t$ secret keys are compromised, the validity of all forward secure ring signatures generated in the past is still preserved. In the other way, the compromise of up to all secret keys does not allow any adversary to generate a valid key-insulated ring signature for the remaining time periods.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: Signatures
Contact author(s): liu @ cs bris ac uk
History: 2005-11-23: received
Short URL: https://ia.cr/2005/427
License: CC BY

BibTeX

@misc{cryptoeprint:2005/427,
      author = {Joseph K.  Liu and Duncan S.  Wong},
      title = {Solutions to Key Exposure Problem in Ring Signature},
      howpublished = {Cryptology {ePrint} Archive, Paper 2005/427},
      year = {2005},
      url = {https://eprint.iacr.org/2005/427}
}