Cryptology ePrint Archive: Report 2010/442

Algebraic Pseudorandom Functions with Improved Efficiency from the Augmented Cascade

Dan Boneh and Hart Montgomery and Ananth Raghunathan

Abstract: We construct an algebraic pseudorandom function (PRF) that is more efficient than the classic Naor- Reingold algebraic PRF. Our PRF is the result of adapting the cascade construction, which is the basis of HMAC, to the algebraic settings. To do so we define an augmented cascade and prove it secure when the underlying PRF satisfies a property called parallel security. We then use the augmented cascade to build new algebraic PRFs. The algebraic structure of our PRF leads to an efficient large-domain Verifiable Random Function (VRF) and a large-domain simulatable VRF.

Category / Keywords: foundations / pseudorandom functions

Publication Info: ACM CCS 2010

Date: received 13 Aug 2010

Contact author: dabo at cs stanford edu

Available format(s): PDF | BibTeX Citation

Note: This is the full version of the extended abstract titled "Algebraic Pseudorandom Functions with Improved Efficiency from the Augmented Cascade" that appears in ACM CCS 2010.

Version: 20100817:100737 (All versions of this report)

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