Parallel Multiplication in GF(2^k) usingPolynomial Residue Arithmetic

  • Authors:
  • A. Halbutogullari;C. K. Koc

  • Affiliations:
  • Dipartimento di Matematica, Università della Basilicata, via N. Sauro 85, 85100 Potenza (Italy);Electrical & Computer Engineering, Oregon State University, Corvallis, Oregon 97331

  • Venue:
  • Designs, Codes and Cryptography
  • Year:
  • 2000

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Abstract

We present a novel methodof parallelization of the multiplication operation in \GF(2^k)for an arbitrary value of k and arbitrary irreduciblepolynomial n(x) generating the field. The parallelalgorithm is based on polynomial residue arithmetic, and requiresthat we find L pairwise relatively prime modulim_i(x) such that the degree of the product polynomialM(x)=m_1(x)m_2(x)\cdots m_L(x) is at least 2k.The parallel algorithm receives the residue representations ofthe input operands (elements of the field) and produces the resultin its residue form, however, it is guaranteed that the degreeof this polynomial is less than k and it is properlyreduced by the generating polynomial n(x), i.e.,it is an element of the field. In order to perform the reductions,we also describe a new table lookup based polynomial reductionmethod.