Paper 2013/053 Original: eprint.iacr.org/2013/053 ↗
A revocable certificateless signature scheme
Abstract
Certificateless public key cryptography (CLPKC), with properties of no key escrow and no certificate, has received a lot of attention since its invention. However, membership revocation in certificateless cryptosystem still remains a non-trivial problem: the existing solutions are not practical for use due to either a costly mediator or enormous computation (secret channel). In this paper, we present a new approach to revocation in CLPKC with a concrete construction of a revocable certificateless signature (RCLS) scheme. In our scheme, a user's private key is composed of three parts: an initial partial private key, a time key and a secret value. The transmission of updated-key requires only a public channel, which makes our RCLS scheme more efficient than other methods. We first provide formal definition and security model for a RCLS scheme. The new scheme is proved secure in the random oracle model, based on the Computational Diffie-Hellman problem.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2013-02-06: last updated
- 2013-02-06: published
- Short URL
- https://ia.cr/2013/053
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2013/053,
author = {Yinxia Sun and Futai Zhang and Limin Shen and Robert H. Deng},
title = {A revocable certificateless signature scheme},
howpublished = {Cryptology {ePrint} Archive, Paper 2013/053},
year = {2013},
url = {https://eprint.iacr.org/2013/053}
}