Paper 2009/118
A2BE: Accountable Attribute-Based Encryption for Abuse Free Access Control
Jin Li, Kui Ren, and Kwangjo Kim
Abstract
As a recently proposed public key primitive, attribute-based
encryption (ABE) (including Ciphertext-policy ABE (CP-ABE) and
Key-policy ABE (KP-ABE)) is a highly promising tool for secure
access control. In this paper, the issue of key abuse in ABE is
formulated and addressed. Two kinds of key abuse problems are
considered, i) illegal key sharing among colluding users and ii)
misbehavior of the semi-trusted attribute authority including
illegal key (re-)distribution. Both problems are extremely important
as in an ABE-based access control system, the attribute private keys
directly imply users' privileges to the protected resources. To the
best knowledge of ours, such key abuse problems exist in all current
ABE schemes as the attribute private keys assigned to the users are
never designed to be linked to any user specific information except
the commonly shared user attributes.
To be concrete, we focus on the prevention of key abuse in CP-ABE in
this paper \footnote{Our technique can easily be extended to KP-ABE
as well.}. The notion of accountable CP-ABE (CP-A
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Contact author(s)
- jin li @ iit edu
- History
- 2009-04-14: revised
- 2009-03-14: received
- See all versions
- Short URL
- https://ia.cr/2009/118
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2009/118, author = {Jin Li and Kui Ren and Kwangjo Kim}, title = {{A2BE}: Accountable Attribute-Based Encryption for Abuse Free Access Control}, howpublished = {Cryptology {ePrint} Archive, Paper 2009/118}, year = {2009}, url = {https://eprint.iacr.org/2009/118} }