[PDF][PDF] Faster sparse polynomial interpolation of straight-line programs over finite fields

A Arnold, M Giesbrecht, DS Roche - 2014 - researchgate.net
A Arnold, M Giesbrecht, DS Roche
2014researchgate.net
We present a faster Monte Carlo algorithm for the interpolation of a straight-line program to
find a sparse polynomial f over an arbitrary finite field of size q. We assume a priori bounds
D and T are given on the degree and number of terms of f. The approach presented in this
paper is a hybrid of the diversified and recursive interpolation algorithms, the two previous
fastest known probabilistic methods for this problem. By making effective use of the
information contained in the coefficients themselves, this new algorithm improves on the bit …
Abstract
We present a faster Monte Carlo algorithm for the interpolation of a straight-line program to find a sparse polynomial f over an arbitrary finite field of size q. We assume a priori bounds D and T are given on the degree and number of terms of f. The approach presented in this paper is a hybrid of the diversified and recursive interpolation algorithms, the two previous fastest known probabilistic methods for this problem. By making effective use of the information contained in the coefficients themselves, this new algorithm improves on the bit complexity of previous methods by a “soft-Oh” factor of T, log D, or log q.
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