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ACE: a VLSI chip for Galois field GF(2m) based exponentiation

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2 Author(s)
Kovac, M. ; Fac. of Electr. Eng., Zagreb Univ., Croatia ; Ranganathan, N.

Finite or Galois fields are used in numerous applications like error correcting codes, digital signal processing and cryptography. These applications often require computing exponentiations in GF(2m ) which is a very computationally intensive operation. The methods proposed in the literature achieve exponentiation by iterative methods using repeated multiplications and the hardware implementations use a number of Galois field multipliers in parallel resulting in expensive hardware. In this paper, we present a new algorithm based on a pattern matching technique for computing exponentiations in GF(2m), for values of m⩽8. A systolic array processor architecture was developed by the authors for performing multiplication and division in GF(2m) in [13]. A similar strategy is proposed in this paper for achieving exponentiation at the rate of a new result every clock cycle. A prototype VLSI chip Called ACE implementing the proposed architecture for Galois field GF(24) has been designed and verified using CMOS 2 μm technology. The chip can yield a computational rate of 40 million exponentiations per second

Published in:

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:43 ,  Issue: 4 )

Date of Publication:

Apr 1996

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