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Title:
A Chinese Remainder Theorem Approach to Bit-Parallel GF(2^n) Polynomial Basis Multipliers for Irreducible Trinomials
Authors: Haining Fan
Abstract:We show that the step “modulo the degree-n field generating irreducible polynomial” in the classical definition of the GF(2^n) multiplication operation can be avoided. This leads to an alternative representation of the finite field multiplication operation. Combining this representation and the Chinese Remainder Theorem, we design bit-parallel GF(2^n) multipliers for irreducible trinomials u^n + u^k + 1 on GF(2) where 1 < k ≤ n=2. For some values of n, our architectures have the same time complexity as the fastest bit-parallel multipliers – the quadratic multipliers, but their space complexities are reduced. Take the special irreducible trinomial u^(2k) + u^k + 1 for example, the space complexity of the proposed design is reduced by about 1=8, while the time complexity matches the best result. Our experimental results show that among the 539 values of n such that 4 < n < 1000 and x^n+x^k+1 is irreducible over GF(2) for some k in the range 1 < k ≤ n=2, the proposed multipliers beat the current fastest parallel multipliers for 290 values of n when (n − 1)=3 ≤ k ≤ n=2: they have the same time complexity, but the space complexities are reduced by 8.4% on average.
ePrint: https://eprint.iacr.org/2014/972
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