Paper 2005/369
Secure and {\sl Practical} Identity-Based Encryption
David Naccache
Abstract
In this paper, we present a variant of Waters' Identity-Based Encryption scheme with a much smaller public-key size (only a few kilobytes). We show that this variant is semantically secure against passive adversaries in the standard model.\smallskip In essence, the new scheme divides Waters' public key size by a factor $\ell$ at the cost of (negligibly) reducing security by $\ell$ bits. Therefore, our construction settles an open question asked by Waters and constitutes the first fully secure {\sl practical} Identity-Based Encryption scheme.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- IBEWatersIdentity
- Contact author(s)
- david naccache @ ens fr
- History
- 2005-10-19: received
- Short URL
- https://ia.cr/2005/369
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2005/369,
author = {David Naccache},
title = {Secure and {\sl Practical} Identity-Based Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2005/369},
year = {2005},
url = {https://eprint.iacr.org/2005/369}
}
