Black Box Traceable Ciphertext Policy Attribute-Based Encryption Scheme

Information

Xingbing Fu²  Xuyun Nie²  Fagen Li¹ 

[1] School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China; E-Mail:;School of Information and Software Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China; E-Mail:

关键词: black box;    CP-ABE;    oblivious transfer;    private key generator;    tracing;   

DOI  :  10.3390/info6030481

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.