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Speeding up deciphering by hypergraph ordering

机译:通过超图排序加速解密

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摘要

The "Gluing Algorithm" of Semaev (Des. Codes Cryptogr. 49:47-60, 2008)-that finds all solutions of a sparse system of linear equations over the Galois field GF(q)-has average running time O(mq~(max|U_1~kX_j|-k)), where m is the total number of equations, and U_1~kX_j is the set of all unknowns actively occurring in the first k equations. In order to make the implementation of the algorithm faster, our goal here is to minimize the exponent of q in the case where every equation contains at most three unknowns. The main result states that if the total number |U_1~mX_j| of unknowns is equal to m, then the best achievable exponent is between c_1m and c_2m for some positive constants c_1 and c_2.
机译:Semaev的“胶合算法”(Des。Codes Cryptogr。49:47-60,2008)-查找在Galois场GF(q)上的稀疏线性方程组的所有解-具有平均运行时间O(mq〜 (max | U_1〜kX_j | -k),其中m是方程式的总数,U_1〜kX_j是在前k个方程式中活跃发生的所有未知数的集合。为了使算法的实现更快,我们的目标是在每个方程式最多包含三个未知数的情况下最小化q的指数。主要结果表明,如果总数| U_1〜mX_j |的未知数等于m,则对于某些正常数c_1和c_2,最佳可实现指数在c_1m和c_2m之间。

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