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Ciphertext-Policy Attribute-Based Encryption: An Expressive, Efficient, and Provably Secure Realization
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Abstract: | 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 }