## CryptoDB

### Paper: Ciphertext-Policy Attribute-Based Encryption: An Expressive, Efficient, and Provably Secure Realization

Authors: Brent Waters URL: http://eprint.iacr.org/2008/290 Search ePrint Search Google We present new techniques for realizing Ciphertext-Policy Attribute Encryption (CP-ABE) under concrete and noninteractive cryptographic assumptions. Our solutions allow any encryptor to specify access control in terms of an LSSS matrix, $M$, over the attributes in the system. We present three different constructions that allow different tradeoffs between the systems efficiency and the complexity of the assumptions used. All three constructions use a common methodology of directly'' solving the CP-ABE problem that enable us to get much better efficiency than prior approaches.
##### BibTeX
@misc{eprint-2008-17967,
title={Ciphertext-Policy Attribute-Based Encryption: An Expressive, Efficient, and Provably Secure Realization},
booktitle={IACR Eprint archive},
keywords={},
url={http://eprint.iacr.org/2008/290},
note={ bwaters@csl.sri.com 14123 received 27 Jun 2008, last revised 1 Sep 2008},
author={Brent Waters},
year=2008
}