Cryptology ePrint Archive: Report 2015/125
Multilinear Pseudorandom Functions
Aloni Cohen and Justin Holmgren
Abstract: We define the new notion of a multilinear pseudorandom function (PRF), and give a construction with a proof of security assuming the hardness of the decisional Diffie-Hellman problem. A direct application of our construction yields (non-multilinear) PRFs with aggregate security from the same assumption, resolving an open question of Cohen, Goldwasser, and Vaikuntanathan. Additionally, multilinear PRFs give a new way of viewing existing algebraic PRF constructions: our main theorem implies they too satisfy aggregate security.
Category / Keywords: secret-key cryptography / pseudo-random functions, decisional Diffie-Hellman, algebraic PRFs
Date: received 17 Feb 2015
Contact author: holmgren at mit edu
Available format(s): PDF | BibTeX Citation
Version: 20150226:120526 (All versions of this report)
Short URL: ia.cr/2015/125
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