• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Ciphertext-Policy Attribute-Based Encryption with Hidden Access Policy and Testing

Vol. 10, No. 7, July 30, 2016
10.3837/tiis.2016.07.026, Download Paper (Free):

Abstract

In ciphertext-policy attribute-based encryption (CP-ABE) scheme, a user’s secret key is associated with a set of attributes, and the ciphertext is associated with an access policy. The user can decrypt the ciphertext if and only if the attribute set of his secret key satisfies the access policy specified in the ciphertext. In the present schemes, access policy is sent to the decryptor along with the ciphertext, which means that the privacy of the encryptor is revealed. In order to solve such problem, we propose a CP-ABE scheme with hidden access policy, which is able to preserve the privacy of the encryptor and decryptor. And what’s more in the present schemes, the users need to do excessive calculation for decryption to check whether their attributes match the access policy specified in the ciphertext or not, which makes the users do useless computation if the attributes don’t match the hidden access policy. In order to solve efficiency issue, our scheme adds a testing phase to avoid the unnecessary operation above before decryption. The computation cost for the testing phase is much less than the decryption computation so that the efficiency in our scheme is improved. Meanwhile, our new scheme is proved to be selectively secure against chosen-plaintext attack under DDH assumption.


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Cite this article

[IEEE Style]
J. Li, H. Wang, Y. Zhang and J. Shen, "Ciphertext-Policy Attribute-Based Encryption with Hidden Access Policy and Testing," KSII Transactions on Internet and Information Systems, vol. 10, no. 7, pp. 3339-3352, 2016. DOI: 10.3837/tiis.2016.07.026.

[ACM Style]
Jiguo Li, Haiping Wang, Yichen Zhang, and Jian Shen. 2016. Ciphertext-Policy Attribute-Based Encryption with Hidden Access Policy and Testing. KSII Transactions on Internet and Information Systems, 10, 7, (2016), 3339-3352. DOI: 10.3837/tiis.2016.07.026.