@inproceedings{7ca6a545d311499ba0efcf48521efd8b,
title = "Fully secure ciphertext-policy attribute based encryption with security mediator",
abstract = "Attribute-Based Encryption (ABE) offers fine-grained decryption policy such that users can do decryption if their attributes satisfy the policy. Such flexibility enables it applicable in various applications in government and business. However, there are two issues that should be solved first before it is deployed in practice, namely user revocation and decryption outsourcing. In this paper, we adopt the slightly modified Lewko et al.{\textquoteright}s fully-CCA-secure Ciphertext-Policy-ABE (CPABE) combining with Boneh et al.{\textquoteright}s idea of mediated cryptography to propose a CP-ABE with SEcurity Mediator (SEM) supporting immediate user revocation. At the same time, by the introduce of SEM, we intendedly outsource most of the computation workload in decryption to SEM side and leave only one exponentiation and one division at user side for decryption. It is proved fully-RCCA-CCA-secure in random oracle model.",
keywords = "CP-ABE, Decryption outsourcing, Dual encryption system, Security mediator, User revocation",
author = "Yuechen Chen and Jiang, {Zoe L.} and Yiu, {S. M.} and Liu, {Joseph K.} and Au, {Man Ho Allen} and Xuan Wang",
year = "2015",
month = jan,
day = "1",
doi = "10.1007/978-3-319-21966-0_20",
language = "English",
isbn = "9783319219653",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "274--289",
booktitle = "Information and Communications Security - 16th International Conference, ICICS 2014, Revised Selected Papers",
address = "Germany",
note = "16th International Conference on Information and Communications Security, ICICS 2014 ; Conference date: 16-12-2014 Through 17-12-2014",
}