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Paper 2018/479
On the security of Jhanwar-Barua Identity-Based Encryption Scheme
Adrian G. Schipor
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)
- Category
- Public-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- identity based encryptionibe
- Contact author(s)
- agschipor @ gmail com
- History
- 2018-05-23: received
- Short URL
- https://ia.cr/2018/479
- License
-
CC BY