Exploration of Design Space in ECDSA

  • Authors:
  • Jan Schmidt;Martin Novotný;Martin Jäger;Milos Becvár;Michal Jáchim

  • Affiliations:
  • -;-;-;-;-

  • Venue:
  • FPL '02 Proceedings of the Reconfigurable Computing Is Going Mainstream, 12th International Conference on Field-Programmable Logic and Applications
  • Year:
  • 2002

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Abstract

The paper compares FPGA implementation of scaled polynomial basis and normal basis arithmetic units in the context of cryptographic coprocessor performing operations on elliptic curve points with coordinates in GF(2m). The hardware uses GCD division in polynomial basis and Itoh-Teechai-Tsujii inversion in normal basis. Where an optimal normal basis exists, the normal basis arithmetic performs better. The digit width of 6 is shown to give the best area/performance ratio for optimal normal basis arithmetic.