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Gauss Period, Sparse Polynomial, Redundant Basis, and Efficient Exponentiation for a Class of Finite Fields with Small Characteristic

机译:一类具有小特征的有限域的高斯周期,稀疏多项式,冗余基和有效指数

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We present an efficient exponentiation algorithm in a finite field GF(q~n) using a Gauss period of type (n, 1). Though the Gauss period α of type (n, 1) in GF(q~n) is never primitive, a computational evidence says that there always exists a sparse polynomial (especially, a trinomial) of α which is a primitive element in GF(q~n). Our idea is easily generalized to the field determined by a root of unity over GF(q) with redundant basis technique. Consequently, we find primitive elements which yield a fast exponentiation algorithm for many finite fields GF(q~n), where a Gauss period of type (n,k) exists only for larger values of k or the existing Gauss period is not primitive and has large index in the multiplicative group GF(q~n)~x.
机译:我们使用类型(n,1)的高斯周期在有限域GF(q〜n)中提出一种有效的幂运算算法。尽管GF(q〜n)中类型(n,1)的高斯周期α从来都不是原始的,但计算证据表明,总是存在α的稀疏多项式(尤其是三项式),它是GF(q〜n)中的原始元素q〜n)。我们的想法很容易推广到使用冗余基技术在GF(q)上由一个单位根确定的领域。因此,我们发现原始元素能够为许多有限域GF(q〜n)产生快速幂运算算法,其中仅对于较大的k值才存在类型(n,k)的高斯周期,或者现有的高斯周期不是原始的,在乘法群GF(q〜n)〜x中具有较大的索引。

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