Paper 2004/212 Original: eprint.iacr.org/2004/212 ↗
ID-Based Encryption for Complex Hierarchies with Applications to Forward Security and Broadcast Encryption
Abstract
A forward-secure encryption scheme protects secret keys from exposure by evolving the keys with time. Forward security has several unique requirements in Hierarchical Identity-Based Encryption (HIBE) scheme: (1) users join dynamically; (2) encryption is joining-time-oblivious; (3) users evolve secret keys autonomously. We present a scalable forward-secure HIBE scheme satisfying the above properties. Note that a naive combination of Gentry-Silverberg HIBE scheme with the forward-secure Public-Key Encryption scheme by Canetti, Halevi and Katz would not meet the requirements. We also show how our fs-HIBE scheme can be used to construct a forward-secure public-key Broadcast Encryption scheme, which protects the secrecy of prior transmissions in the Broadcast Encryption setting. We further generalize fs-HIBE into a collusion-resistant Multiple Hierarchical ID-Based Encryption scheme, which can be used for secure communications with entities having multiple roles in Role-Based Access Control. The security of our schemes is based on the Bilinear Diffie-Hellman assumption in the random oracle model.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2004-08-30: last updated
- 2004-08-26: published
- Short URL
- https://ia.cr/2004/212
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2004/212,
author = {Danfeng Yao and Nelly Fazio and Yevgeniy Dodis and Anna Lysyanskaya},
title = {ID-Based Encryption for Complex Hierarchies with Applications to Forward Security and Broadcast Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2004/212},
year = {2004},
url = {https://eprint.iacr.org/2004/212}
}