Open Access

Enhanced Montgomery Multiplication on DSP Architectures for Embedded Public-Key Cryptosystems

EURASIP Journal on Embedded Systems20082008:583926

DOI: 10.1155/2008/583926

Received: 21 September 2007

Accepted: 27 February 2008

Published: 12 March 2008

Abstract

Montgomery's algorithm is a popular technique to speed up modular multiplications in public-key cryptosystems. This paper tackles the efficient support of modular exponentiation on inexpensive circuitry for embedded security services and proposes a variant of the finely integrated product scanning (FIPS) algorithm that is targeted to digital signal processors. The general approach improves on the basic FIPS formulation by removing potential inefficiencies and boosts the exploitation of computing resources. The reformulation of the basic FIPS structure results in a general approach that balances computational efficiency and flexibility. Experimental results on commercial DSP platforms confirm both the method's validity and its effectiveness.

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Authors’ Affiliations

(1)
Department of Biophysical and Electronic Engineering (DIBE), University of Genoa

Copyright

© P. Gastaldo et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.