Cryptology ePrint Archive: Report 2012/326

New Proof Methods for Attribute-Based Encryption: Achieving Full Security through Selective Techniques

Allison Lewko and Brent Waters

Abstract: We develop a new methodology for utilizing the prior techniques to prove selective security for functional encryption systems as a direct ingredient in devising proofs of full security. This deepens the relationship between the selective and full security models and provides a path for transferring the best qualities of selectively secure systems to fully secure systems. In particular, we present a Ciphertext-Policy Attribute-Based Encryption scheme that is proven fully secure while matching the efficiency of the state of the art selectively secure systems.

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Publication Info: this is the full version of a paper appearing in Crypto 2012

Date: received 8 Jun 2012

Contact author: alewko at cs utexas edu

Available format(s): PDF | BibTeX Citation

Version: 20120612:035928 (All versions of this report)

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