Paper 2018/479 Original: eprint.iacr.org/2018/479 ↗
On the security of Jhanwar-Barua Identity-Based Encryption Scheme
Abstract
In 2008, Jhanwar and Barua presented an improvement of the Boneh-Gentry-Hamburg (BGH) scheme. In addition to reducing the time complexity of the algorithm to find a solution of the equation $ax^2+Sy^2\equiv 1 \bmod n$, their scheme reduces the number of equations to be solved by combining existing solutions. Susilo et al. extended the Jhanwar-Barua scheme, reducing more the number of equations to be solved. This paper presents a security flaw that appears in both schemes and shows that they are not IND-ID-CPA secure.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2018-05-23: last updated
- 2018-05-23: published
- Short URL
- https://ia.cr/2018/479
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2018/479,
author = {Adrian G. Schipor},
title = {On the security of Jhanwar-Barua Identity-Based Encryption Scheme},
howpublished = {Cryptology {ePrint} Archive, Paper 2018/479},
year = {2018},
url = {https://eprint.iacr.org/2018/479}
}