Paper 2021/1575
Shorter Lattice-Based Group Signatures via ``Almost Free'' Encryption and Other Optimizations
Vadim Lyubashevsky, Ngoc Khanh Nguyen, Maxime Plancon, and Gregor Seiler
Abstract
We present an improved lattice-based group signature scheme whose parameter sizes and running times are independent of the group size. The signature length in our scheme is around $200$KB, which is approximately a $3$X reduction over the previously most compact such scheme, based on any quantum-safe assumption, of del Pino et al. (ACM CCS 2018). The improvement comes via several optimizations of some basic cryptographic components that make up group signature schemes, and we think that they will find other applications in privacy-based lattice cryptography.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- A major revision of an IACR publication in ASIACRYPT 2021
- DOI
- 10.1007/978-3-030-92068-5_8
- Keywords
- group signatureslattices
- Contact author(s)
-
vadim lyubash @ gmail com
nkn @ zurich ibm com
mpl @ zurich ibm com
grs @ zurich ibm com - History
- 2021-12-03: received
- Short URL
- https://ia.cr/2021/1575
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2021/1575,
author = {Vadim Lyubashevsky and Ngoc Khanh Nguyen and Maxime Plancon and Gregor Seiler},
title = {Shorter Lattice-Based Group Signatures via ``Almost Free'' Encryption and Other Optimizations},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/1575},
year = {2021},
doi = {10.1007/978-3-030-92068-5_8},
url = {https://eprint.iacr.org/2021/1575}
}
