Title: GO-CP-ABE: group-oriented ciphertext-policy attribute-based encryption

Authors: Yang Li; Xiaoling Tao; Wei Wu; Joseph K. Liu

Addresses: Fujian Provincial Key Laboratory of Network Security and Cryptology, School of Mathematics and Computer Science, Fujian Normal University, Fuzhou, China ' Key Laboratory of Cognitive Radio and Information Processing, University of Electronic Technology, Guilin 541004, China; Guangxi Colleges and Universities Key Laboratory of Cloud Computing and Complex Systems, Guilin University of Electronic Technology, Guilin 541004, China ' Fujian Provincial Key Laboratory of Network Security and Cryptology, School of Mathematics and Computer Science, Fujian Normal University, Fuzhou, China ' Faculty of Information Technology, Monash University, Australia

Abstract: We introduce a variant of ciphertext-policy attribute-based encryption called group-oriented ciphertext-policy attribute-based encryption (GO-CP-ABE). In the new notion, message is encrypted under an access structure over attributes and users are described by their attributes. In addition, users are divided into different groups and each user belongs to only one group. Users within the same group can merge their attributes to decrypt successfully, if the union of their attributes satisfies the access structure embedded in the ciphertext. But users from different groups cannot realise this cooperative decryption. We define the security model of GO-CP-ABE and present an efficient design by revising an existing CP-ABE scheme.

Keywords: attribute-based encryption; group-oriented; access structure; cooperative decryption.

DOI: 10.1504/IJES.2018.089434

International Journal of Embedded Systems, 2018 Vol.10 No.1, pp.62 - 70

Received: 13 Aug 2015
Accepted: 27 Mar 2016

Published online: 18 Jan 2018 *

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