Paper 2019/371 Original: eprint.iacr.org/2019/371 ↗
Adding Linkability to Ring Signatures with One-Time Signatures
Abstract
We propose a generic construction that adds linkability to any ring signature scheme with one-time signature scheme. Our construction has both theoretical and practical interest. In theory, the construction gives a formal and cleaner description for constructing linkable ring signature from ring signature directly. In practice, the transformation incurs a tiny overhead in size and running time. By instantiating our construction using the ring signature scheme (ACNS 2019) and the one-time signature scheme (TCHES 2018), we obtain a lattice-based linkable ring signature scheme whose signature size is logarithmic in the number of ring members. This scheme is practical, especially the signature size is very short: for $2^{30}$ ring members and 100 bit security, our signature size is only 4 MB. In addition, when proving the linkability we develop a new proof technique in the random oracle model, which might be of independent interest
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2019-09-03: last updated
- 2019-04-11: published
- Short URL
- https://ia.cr/2019/371
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2019/371,
author = {Xueli Wang and Yu Chen and Xuecheng Ma},
title = {Adding Linkability to Ring Signatures with One-Time Signatures},
howpublished = {Cryptology {ePrint} Archive, Paper 2019/371},
year = {2019},
url = {https://eprint.iacr.org/2019/371}
}