Paper 2024/501
Anonymous Revocable Identity-Based Encryption Supporting Anonymous Revocation
Abstract
Anonymous identity-based encryption (AIBE) is an extension of identity-based encryption (IBE) that enhances the privacy of a ciphertext by providing ciphertext anonymity. In this paper, we introduce the concept of revocable IBE with anonymous revocation (RIBE-AR), which is capable of issuing an update key and hiding the revoked set of the update key that efficiently revokes private keys of AIBE. We first define the security models of RIBE-AR and propose an efficient RIBE-AR scheme in bilinear groups. Our RIBE-AR scheme is similar to the existing RIBE scheme in terms of efficiency, but is the first RIBE scheme to provide additional ciphertext anonymity and revocation privacy. We show that our RIBE-AR scheme provides the selective message privacy, selective identity privacy, and selective revocation privacy.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Preprint.
- Keywords
- Identity-based encryptionCiphertext anonymityKey revocationRevocation privacy
- Contact author(s)
- kwangsu @ sejong ac kr
- History
- 2024-04-01: approved
- 2024-03-28: received
- See all versions
- Short URL
- https://ia.cr/2024/501
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2024/501,
author = {Kwangsu Lee},
title = {Anonymous Revocable Identity-Based Encryption Supporting Anonymous Revocation},
howpublished = {Cryptology ePrint Archive, Paper 2024/501},
year = {2024},
note = {\url{https://eprint.iacr.org/2024/501}},
url = {https://eprint.iacr.org/2024/501}
}
