Paper 2022/307
An Anonymous Trace-and-Revoke Broadcast Encryption Scheme
Olivier Blazy, Sayantan Mukherjee, Huyen Nguyen, Duong Hieu Phan, and Damien Stehle
Abstract
Broadcast Encryption is a fundamental cryptographic primitive, that gives the ability to send a secure message to any chosen target set among registered users.
In this work, we investigate broadcast encryption with anonymous revocation, in which ciphertexts
do not reveal any information on which users have been revoked.
We provide a scheme whose ciphertext size grows linearly with the number of revoked users. Moreover, our system also achieves traceability in the black-box confirmation model.
Technically, our contribution is threefold. First, we develop a generic transformation of linear functional encryption toward trace-and-revoke systems for 1-bit message space. It is inspired from the transformation by Agrawal {et al} (CCS'17) with the novelty of achieving anonymity.
Our second contribution is to instantiate the underlying linear functional encryptions from standard assumptions. We propose a
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Minor revision. ACISP 2021
- DOI
- 10.1007/978-3-030-90567-5_11
- Contact author(s)
- csayantan mukherjee @ gmail com
- History
- 2022-03-07: received
- Short URL
- https://ia.cr/2022/307
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2022/307, author = {Olivier Blazy and Sayantan Mukherjee and Huyen Nguyen and Duong Hieu Phan and Damien Stehle}, title = {An Anonymous Trace-and-Revoke Broadcast Encryption Scheme}, howpublished = {Cryptology {ePrint} Archive, Paper 2022/307}, year = {2022}, doi = {10.1007/978-3-030-90567-5_11}, url = {https://eprint.iacr.org/2022/307} }