Paper 2002/064 Original: eprint.iacr.org/2002/064 ↗
Protecting against Key Exposure: Strongly Key-Insulated Encryption with Optimal Threshold
Abstract
A new framework for protection against key exposure was recently suggested by Dodis et. al.. We take its realization further towards practice by presenting simple new schemes that provide benefits over previous ones in terms of scalability, performance and security. Our first contribution is a simple, practical, scalable scheme called SKIE-OT that achieves the best possible security in their framework. SKIE-OT is based on the Boneh-Franklin identity-based encryption (IBE) scheme and exploits algebraic properties of the latter. We also show that the role of identity-based encryption is not coincidental by proving that IBE is equivalent to (not strongly) key-insulated encryption with optimal threshold and allowing random-access key updates.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2002-06-27: last updated
- 2002-05-25: published
- Short URL
- https://ia.cr/2002/064
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2002/064,
author = {Mihir Bellare and Adriana Palacio},
title = {Protecting against Key Exposure: Strongly Key-Insulated Encryption with Optimal Threshold},
howpublished = {Cryptology {ePrint} Archive, Paper 2002/064},
year = {2002},
url = {https://eprint.iacr.org/2002/064}
}