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Title: User collusion avoidance scheme for privacy-preserving decentralized key-policy attribute-based encryption
Authors: Rahulamathavan, Yogachandran
Veluru, Suresh
Han, Jinguang
Li, Fei
Rajarajan, Muttukrishnan
Lu, Rongxing
Keywords: Encryption
Privacy
Protocols
Hospitals
Complexity theory
Issue Date: 2015
Publisher: © IEEE
Citation: RAHULAMATHAVAN, Y. ... et al, 2015. User collusion avoidance scheme for privacy-preserving decentralized key-policy attribute-based encryption. IEEE Transactions on Computers, 65 (9), pp. 2939-2946.
Abstract: Decentralized attribute-based encryption (ABE) is a variant of multi-authority based ABE whereby any attribute authority (AA) can independently join and leave the system without collaborating with the existing AAs. In this paper, we propose a user collusion avoidance scheme which preserves the user's privacy when they interact with multiple authorities to obtain decryption credentials. The proposed scheme mitigates the well-known user collusion security vulnerability found in previous schemes. We show that our scheme relies on the standard complexity assumption (decisional bilienar Deffie-Hellman assumption). This is contrast to previous schemes which relies on non-standard assumption (q-decisional Diffie-Hellman inversion).
Description: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council of the U.K. under EPSRC Grant EP/K03345X/1 and National Natural Science Foundation of China under Grant 61300213.
Version: Accepted for publication
DOI: 10.1109/TC.2015.2510646
URI: https://dspace.lboro.ac.uk/2134/23069
Publisher Link: http://dx.doi.org/10.1109/TC.2015.2510646
ISSN: 0018-9340
Appears in Collections:Published Articles (Loughborough University London)

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