Paper 2009/295
Defending Against Key Abuse Attacks in KP-ABE Enabled Broadcast Systems
Shucheng Yu, Kui Ren, Wenjing Lou, and Jin Li
Abstract
Key-Policy Attribute-Based Encryption (KP-ABE) is a promising cryptographic primitive which enables fine-grained access control over sensitive data. However, key abuse attacks in KP-ABE may impede its wide application especially in copyright-sensitive systems. To defend against this kind of attacks, this paper proposes a novel KP-ABE scheme which is able to disclose any illegal key distributor’s ID when key abuse is detected. In our scheme, each bit of user ID is defined as an attribute and the user secret key is associated with his unique ID. The tracing algorithm fulfills its task by tricking the pirate device into decrypting the ciphertext associated with the corresponding bits of his ID. Our proposed scheme has the salient property of black box tracing, i.e., it traces back to the illegal key distributor’s ID only by observing the pirate device’s outputs on certain inputs. In addition, it does not require the pirate device’s secret keys to be well-formed as compared to some previous work. Our proposed scheme is provably secure under the Decisional Bilinear Diffie-Hellman (DBDH) assumption and the Decisional Linear (DL) assumption.
Note: This is the revised version to the previous one.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Accepted by securecomm 2009.
- Keywords
- attribute-based encryptiontraitor tracingbroadcast
- Contact author(s)
- yscheng @ wpi edu
- History
- 2009-07-01: last of 2 revisions
- 2009-06-24: received
- See all versions
- Short URL
- https://ia.cr/2009/295
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2009/295,
author = {Shucheng Yu and Kui Ren and Wenjing Lou and Jin Li},
title = {Defending Against Key Abuse Attacks in {KP}-{ABE} Enabled Broadcast Systems},
howpublished = {Cryptology {ePrint} Archive, Paper 2009/295},
year = {2009},
url = {https://eprint.iacr.org/2009/295}
}
