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Paper 2007/323

Attribute-Based Encryption with Non-Monotonic Access Structures

Rafail Ostrovsky and Amit Sahai and Brent Waters

Abstract

We construct an Attribute-Based Encryption (ABE) scheme that allows a user's private key to be expressed in terms of any access formula over attributes. Previous ABE schemes were limited to expressing only monotonic access structures. We provide a proof of security for our scheme based on the Decisional Bilinear Diffie-Hellman (BDH) assumption. Furthermore, the performance of our new scheme compares favorably with existing, less-expressive schemes.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Full paper of an extended abstract that will appear at CCS 2007
Contact author(s)
bwaters @ csl sri com
History
2007-08-20: received
Short URL
https://ia.cr/2007/323
License
Creative Commons Attribution
CC BY
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