Paper 2019/1367 Original: eprint.iacr.org/2019/1367 ↗
Tight reduction for generic construction of certificateless signature and its instantiation from DDH assumption
Abstract
Certificateless signature was proposed by Al-Riyami and Paterson to eliminate the certificate management in the public-key infrastructures and solve the key escrow problem in the identity-based signature. In 2007, Hu et al. proposed a generic construction of certificateless signature. They construct certificateless signature scheme from any standard identity-based signature and signature scheme.However, their security reduction is loose; the security of the constructed scheme depends on the number of users. In this paper, we give the tight reduction for their construction and instantiate a tightly-secure certificateless signature scheme without pairing from DDH assumption. Best of our knowledge, this scheme is the first tightly-secure certificateless signature scheme.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2019-12-10: last updated
- 2019-11-27: published
- Short URL
- https://ia.cr/2019/1367
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2019/1367,
author = {Keitaro Hashimoto and Wakaha Ogata and Toi Tomita},
title = {Tight reduction for generic construction of certificateless signature and its instantiation from DDH assumption},
howpublished = {Cryptology {ePrint} Archive, Paper 2019/1367},
year = {2019},
url = {https://eprint.iacr.org/2019/1367}
}