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CHES
2004
Springer

A Low-Cost ECC Coprocessor for Smartcards

14 years 4 months ago
A Low-Cost ECC Coprocessor for Smartcards
Abstract. In this article we present a low-cost coprocessor for smartcards which supports all necessary mathematical operations for a fast calculation of the Elliptic Curve Digital Signature Algorithm (ECDSA) based on the finite field GF(2m ). These ECDSA operations are GF(2m ) addition, 4-bit digit-serial multiplication in GF(2m ), inversion in GF(2m ), and inversion in GF(p). An efficient implementation of the multiplicative inversion which breaks the 11:1 limit regarding multiplications makes it possible to use affine instead of projective coordinates for point operations on elliptic curves. A bitslice architecture allows an easy adaptation for different bit lengths. A small chip area is achieved by reusing the hardware registers for different operations.
Harald Aigner, Holger Bock, Markus Hütter, Jo
Added 01 Jul 2010
Updated 01 Jul 2010
Type Conference
Year 2004
Where CHES
Authors Harald Aigner, Holger Bock, Markus Hütter, Johannes Wolkerstorfer
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