@inproceedings{79c55c240fff4430bc2386b86e429254,
title = "Practical direct chosen ciphertext secure key-policy attribute-based encryption with public ciphertext test",
abstract = "We propose a direct Key-Policy Attribute-Based Encryption (KP-ABE) scheme with semantic security against adaptively chosen ciphertext attacks (CCA2) in the standard model. Compared with its counterpart with security against chosen-plaintext attacks (CPA), the cost of our scheme is only a Chameleon hash. In contrast to the Boyen-Mei-Waters shrink approach from CPA-secure (l∈+∈1)-Hierarchical Identity Based Encryption ((l∈+∈1)- HIBE) to CCA2-secure l-HIBE, our approach only adds one on-the-fly dummy attribute. Further, our approach only requires that the underlying ABE is selectively secure and allows public ciphertext test. A major obstacle for the security proof in this scenario is that the simulator cannot prepare the challenge ciphertext associated with the on-the-fly dummy attribute due to the selective security constraint. We circumvent this obstacle with a Chameleon hash. Technically, unlike existing use of Chameleon hash in (online/offline) signature applications, our work shows Chameleon hash can also have unique applications in encryption schemes.",
keywords = "Attribute-Based Encryption, Chameleon Hash, Chosen Ciphertext Security",
author = "Weiran Liu and Jianwei Liu and Qianhong Wu and Bo Qin and Yunya Zhou",
year = "2014",
doi = "10.1007/978-3-319-11212-1\_6",
language = "英语",
isbn = "9783319112114",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
number = "PART 2",
pages = "91--108",
booktitle = "Computer Security, ESORICS 2014 - 19th European Symposium on Research in Computer Security, Proceedings",
address = "德国",
edition = "PART 2",
note = "19th European Symposium on Research in Computer Security, ESORICS 2014 ; Conference date: 07-09-2014 Through 11-09-2014",
}