Paper 2017/219 Original: eprint.iacr.org/2017/219 ↗
Attribute-Based Encryption from Identity-Based Encryption
Abstract
Ciphertext-policy attribute-based encryption (CP-ABE) is an access control mechanism where a data provider encrypts a secret message and then sends the ciphertext to the receivers according to the access policy which she/he decides. If the attributes of the receivers match the access policy, then they can decrypt the ciphertext. This paper shows a relation between ABE and identity-based encryption (IBE), and presents a bi-directional conversion between an access structure and identities. By the proposed conversion, the ABE scheme constructed from an IBE scheme will inherit the features, such as constant-size ciphertexts and anonymity, from the IBE scheme, and vice versa. It turns out that the proposed conversion also gives the first ABE achieving access structures with wildcard and constant-size ciphertexts/private keys.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2018-01-30: last updated
- 2017-03-04: published
- Short URL
- https://ia.cr/2017/219
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2017/219,
author = {Chun-I Fan and Yi-Fan Tseng and Chih-Wen Lin},
title = {Attribute-Based Encryption from Identity-Based Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/219},
year = {2017},
url = {https://eprint.iacr.org/2017/219}
}