Cryptology ePrint Archive: Report 2010/457

Improving the performance of Luffa Hash Algorithm

Thomaz Oliveira and Julio López

Abstract: Luffa is a new hash algorithm that has been accepted for round two of the NIST hash function competition SHA-3. Computational efficiency is the second most important evaluation criteria used to compare candidate algorithms. In this paper, we describe a fast software implementation of the Luffa hash algorithm for the Intel Core 2 Duo platform. We explore the use of the perfect shuffle operation to improve the performance of 64-bit implementation and 128-bit implementation with the Intel Supplemental SSSE3 instructions. In addition, we introduce a new way of implementing Luffa based on a Parallel Table Lookup instruction. The timings of our 64-bit implementation (C code) resulted in a 16 to 32% speed improvement over the previous fastest implementation.

Category / Keywords: implementation / hash functions implementation luffa

Date: received 24 Aug 2010

Contact author: thomaz oliveira at students ic unicamp br

Available format(s): PDF | BibTeX Citation

Note: Work in progress

Version: 20100831:061404 (All versions of this report)

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