### Ciphertext-Policy Attribute-Based Encrypted Data Equality Test and Classification

Yuzhao Cui, Qiong Huang, Jianye Huang, Hongbo Li, and Guomin Yang

##### Abstract

Thanks to the ease of access and low expenses, it is now popular for people to store data in cloud servers. To protect sensitive data from being leaked to the outside, people usually encrypt the data in the cloud. However, management of these encrypted data becomes a challenging problem, e.g. data classification. Besides, how to selectively share data with other users is also an important and interesting problem in cloud storage. In this paper, we focus on ciphertext-policy attribute based encryption with equality test (CP-ABEET). People can use CP-ABEET to implement not only flexible authorization for the access to encrypted data, but also efficient data label classification, i.e. test of whether two encrypted data contain the same message. We construct an efficient CP-ABEET scheme, and prove its security based on a reasonable number-theoretic assumption. Compared with the only existing CP-ABEET scheme, our construction is more efficient in key generation, and has shorter attribute-related secret keys and better security.

Note: This revise makes sure that there is an "and" between the author names. Thanks for your reading.

Available format(s)
Publication info
Preprint. MINOR revision.
Keywords
Attribute-Based EncryptionAuthorizationClassificationEquality TestPublic Key Encryption
Contact author(s)
yuzhaoc @ stu scau edu cn
History
Short URL
https://ia.cr/2018/1058

CC BY

BibTeX

@misc{cryptoeprint:2018/1058,
author = {Yuzhao Cui and Qiong Huang and Jianye Huang and Hongbo Li and Guomin Yang},
title = {Ciphertext-Policy Attribute-Based Encrypted Data Equality Test and Classification},
howpublished = {Cryptology ePrint Archive, Paper 2018/1058},
year = {2018},
note = {\url{https://eprint.iacr.org/2018/1058}},
url = {https://eprint.iacr.org/2018/1058}
}

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