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Information 2015, 6(3), 481-493; doi:10.3390/info6030481

Black Box Traceable Ciphertext Policy Attribute-Based Encryption Scheme

1
School of Information and Software Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China
2
School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
*
Author to whom correspondence should be addressed.
Academic Editor: Willy Susilo
Received: 9 June 2015 / Revised: 5 August 2015 / Accepted: 5 August 2015 / Published: 14 August 2015
View Full-Text   |   Download PDF [252 KB, uploaded 14 August 2015]

Abstract

In the existing attribute-based encryption (ABE) scheme, the authority (i.e., private key generator (PKG)) is able to calculate and issue any user’s private key, which makes it completely trusted, which severely influences the applications of the ABE scheme. To mitigate this problem, we propose the black box traceable ciphertext policy attribute-based encryption (T-CP-ABE) scheme in which if the PKG re-distributes the users’ private keys for malicious uses, it might be caught and sued. We provide a construction to realize the T-CP-ABE scheme in a black box model. Our scheme is based on the decisional bilinear Diffie-Hellman (DBDH) assumption in the standard model. In our scheme, we employ a pair (ID, S) to identify a user, where ID denotes the identity of a user and S denotes the attribute set associated with her. View Full-Text
Keywords: black box; CP-ABE; oblivious transfer; private key generator; tracing black box; CP-ABE; oblivious transfer; private key generator; tracing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fu, X.; Nie, X.; Li, F. Black Box Traceable Ciphertext Policy Attribute-Based Encryption Scheme. Information 2015, 6, 481-493.

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