Revocable Attribute-Based Encryption for Multi-Keyword Search in Clouds

Chun-I Fan, Si-Jing Wu, and Yi-Fan Tseng

Abstract

With the rapid advancement of cloud computing, users upload their files to the cloud server so that any user can access it remotely. To assure the data security, the data owner, typically, encrypts the data before outsourcing them to the cloud server. In addition, an encryption mechanism needs to enable the consumers to perform efficient searches of such encrypted data in the cloud storages through keywords, i.e. searchable encryption. However, most of searchable encryption is improper due to several limitations, such as the requirement of an on-line fully trusted third party, poor efficiency, high-overhead in user revocation, support of a single keyword search, etc. To mitigate such limitations, an attribute-based encryption scheme with fine-grained multi-keyword search is proposed. The new scheme supports the user revocation. In addition, the length of the ciphertext as well as the secret key do not grow linearly under the influence of the size of attribute set. The performance of the proposed scheme is better as compared to other related schemes. Hence, one can easily adopt the proposed scheme for the real life applications due to its flexibility in terms of its features, security and efficiency.

Available format(s)
Category
Public-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
Attribute-Based EncryptionMulti-Keyword SearchUser RevocationFine-Grained SearchClouds
Contact author(s)
yftseng @ cs nccu edu tw
History
Short URL
https://ia.cr/2021/1056

CC BY

BibTeX

@misc{cryptoeprint:2021/1056,
author = {Chun-I Fan and Si-Jing Wu and Yi-Fan Tseng},
title = {Revocable Attribute-Based Encryption for Multi-Keyword Search in Clouds},
howpublished = {Cryptology ePrint Archive, Paper 2021/1056},
year = {2021},
note = {\url{https://eprint.iacr.org/2021/1056}},
url = {https://eprint.iacr.org/2021/1056}
}

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