Paper 2008/139 Original: eprint.iacr.org/2008/139 ↗
Chosen-Ciphertext Secure Fuzzy Identity-Based Key Encapsulation without ROM
Abstract
We use hybrid encryption with Fuzzy Identity-Based Encryption (Fuzzy-IBE) schemes, and present the first and efficient fuzzy identity-based key encapsulation mechanism (Fuzzy-IB-KEM) schemes which are chosen-ciphertext secure (CCA) without random oracle in the selective-ID model. To achieve these goals, we consider Fuzzy-IBE schemes as consisting of separate key and data encapsulation mechanisms (KEM-DEM), and then give the definition of Fuzzy-IB-KEM. Our main idea is to enhance Sahai and Waters' "large universe" construction (Sahai and Waters, 2005), chosen-plaintext secure (CPA) Fuzzy-IBE, by adding some redundant information to the ciphertext to make it CCA-secure.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2008-04-09: last updated
- 2008-03-31: published
- Short URL
- https://ia.cr/2008/139
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2008/139,
author = {Liming Fang and Jiandong Wang and Yongjun Ren and Jinyue Xia and Shizhu Bian},
title = {Chosen-Ciphertext Secure Fuzzy Identity-Based Key Encapsulation without ROM},
howpublished = {Cryptology {ePrint} Archive, Paper 2008/139},
year = {2008},
url = {https://eprint.iacr.org/2008/139}
}