Cryptology ePrint Archive: Report 2014/754
Bilinear Entropy Expansion from the Decisional Linear Assumption
Lucas Kowalczyk and Allison Bishop Lewko
Abstract: We develop a technique inspired by pseudorandom functions that allows us to increase the entropy available for proving the security of dual system encryption schemes under the Decisional Linear Assumption. We show an application of the tool to Attribute-Based Encryption by presenting a Key-Policy ABE scheme that is fully-secure under DLIN with short public parameters.
Category / Keywords: Cryptographic Protocols, Attribute Based Encryption
Date: received 27 Sep 2014, last revised 1 Jun 2016
Contact author: luke at cs columbia edu
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Note: Prime-order construction in previous versions was broken, and has been removed.
Version: 20160601:115307 (All versions of this report)
Short URL: ia.cr/2014/754
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