Quasi-quadratic elliptic curve point counting using rigid cohomology

被引:1
|
作者
Hubrechts, Hendrik [1 ]
机构
[1] Katholieke Univ Leuven, Dept Math, B-3001 Heverlee, Belgium
关键词
Elliptic curve; Point counting; Rigid cohomology; Cryptography; HYPERELLIPTIC CURVES; ZETA-FUNCTIONS; CRYPTOGRAPHY; COMPUTATION; ALGORITHM;
D O I
10.1016/j.jsc.2008.02.015
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
Let E be a nonsupersingular elliptic curve over the finite field with p(n) elements. We present a deterministic algorithm that computes the zeta function and hence the number of points of such a curve E in time quasi-quadratic in n. An older algorithm having the same time complexity uses the canonical lift of E, whereas our algorithm uses rigid cohomology combined with a deformation approach. An implementation in small odd characteristic turns Out to give very good results. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1255 / 1267
页数:13
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