Paper 2015/311 Original: eprint.iacr.org/2015/311 ↗
Tagged One-Time Signatures: Tight Security and Optimal Tag Size
Abstract
We present an efficient structure-preserving tagged one-time signature scheme with tight security reductions to the decision-linear assumption. Our scheme features short tags consisting of a single group element and gives rise to the currently most efficient structure-preserving signature scheme based on the decision-liner assumption with constant-size signatures of only 14 group elements, where the record-so-far was 17 elements. To demonstrate the advantages of our scheme, we revisit the work by Hofheinz and Jager (CRYPTO 2012) and present the currently most efficient tightly secure public-key encryption scheme. We also obtain the first structure-preserving public-key encryption scheme featuring both tight security and public verifiability.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2015-09-10: last updated
- 2015-04-06: published
- Short URL
- https://ia.cr/2015/311
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2015/311,
author = {Masayuki Abe and Bernardo David and Markulf Kohlweiss and Ryo Nishimaki and Miyako Ohkubo},
title = {Tagged One-Time Signatures: Tight Security and Optimal Tag Size},
howpublished = {Cryptology {ePrint} Archive, Paper 2015/311},
year = {2015},
url = {https://eprint.iacr.org/2015/311}
}