Paper 2005/412 Original: eprint.iacr.org/2005/412 ↗
Constant-Size Hierarchical Identity-Based Signature/Signcryption without Random Oracles
Abstract
We construct the first constant-size hierarchical identity-based signature (HIBS) without random oracles - the signature size is $O(\lambda_s)$ bits, where $\lambda_s$ is the security parameter, and it is independent of the number of levels in the hierarchy. We observe that an efficient hierarchical identity-based signcryption (HIBSC) scheme without random oracles can be compositioned from our HIBS and Boneh, Boyen, and Goh's hierarchical identity-based encryption (HIBE). We further optimize it to a constant-factor efficiency improvement. This is the first constant-size HIBSC without random oracles.
Metadata
- Available format(s)
PDF- Publication info
- Preprint.
- History
- 2006-06-03: last updated
- 2005-11-21: published
- Short URL
- https://ia.cr/2005/412
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2005/412,
author = {Tsz Hon Yuen and Victor K. Wei},
title = {Constant-Size Hierarchical Identity-Based Signature/Signcryption without Random Oracles},
howpublished = {Cryptology {ePrint} Archive, Paper 2005/412},
year = {2005},
url = {https://eprint.iacr.org/2005/412}
}