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[Crack Hack] 简易的矩陣加密編编码法 DL : 0: 算法介绍矩阵求逆在程序中很常见，主要应用于求Billboard矩阵。按照定义的计算方法乘法运算，严重影响了性能。在需要大量Billboard矩阵运算时，矩阵求逆的优化能极大提高性能。这里要介绍的矩阵求逆算法称为全选主元高斯-约旦法。高斯-约旦法（全选主元）求逆的步骤如下：首先，对于 k 从 0 到 n - 1 作如下几步：从第 k 行、第 k 列开始的右下角子阵中选取绝对值最大的元素，并记住次元素所在的行号和列号，在通过行交换和列交换将它交换到主元素位置上。这一步称为全选主元。 m(k, k) = 1 / m(k, k) m(k, j) = m(k, j) * m(k, k)，j = 0, 1, ..., n-1；j != k m(i, j) = m(i, j) - m(i, k) * m(k, j)，i, j = 0, 1, ..., n-1；i, j != k m(i, k) = -m(i, k) * m(k, k)，i = 0, 1, ..., n-1；i != k 最后，根据在全选主元过程中所记录的行、列交换的信息进行恢复，恢复的原则如下：在全选主元过程中，先交换的行（列）后进行恢复；原来的行（列）交换用列（行）交换来恢复。-algorithm introduced in the matrix inversion process is very common, which are mainly used for Billboard matrix. In accordance with the definition of the method of calculating multiplication, seriously affecting the performance. The need for a large number of Billboard matrix operations, matrix inversion optimization can significantly improve performance. Here we introduce the matrix inversion algorithm called full-elected PCA Gauss-Jordan and France. Gauss-Jordan and France (all elected PCA) inversion of the following steps : First, for k from 0 to n-1 for the following steps : from the first trip k, k started out the bottom right corner Subarray largest absolute selected elements, and element remember meeting the line and out, the adoption OK exchange and the exchange out of its exchange
Date : 2008-10-13 Size : 2.81kb User : 刘亮
[Crack Hack] 简易的矩陣加密編编码法 DL : 0: 算法介绍矩阵求逆在程序中很常见，主要应用于求Billboard矩阵。按照定义的计算方法乘法运算，严重影响了性能。在需要大量Billboard矩阵运算时，矩阵求逆的优化能极大提高性能。这里要介绍的矩阵求逆算法称为全选主元高斯-约旦法。高斯-约旦法（全选主元）求逆的步骤如下：首先，对于 k 从 0 到 n - 1 作如下几步：从第 k 行、第 k 列开始的右下角子阵中选取绝对值最大的元素，并记住次元素所在的行号和列号，在通过行交换和列交换将它交换到主元素位置上。这一步称为全选主元。 m(k, k) = 1 / m(k, k) m(k, j) = m(k, j) * m(k, k)，j = 0, 1, ..., n-1；j != k m(i, j) = m(i, j) - m(i, k) * m(k, j)，i, j = 0, 1, ..., n-1；i, j != k m(i, k) = -m(i, k) * m(k, k)，i = 0, 1, ..., n-1；i != k 最后，根据在全选主元过程中所记录的行、列交换的信息进行恢复，恢复的原则如下：在全选主元过程中，先交换的行（列）后进行恢复；原来的行（列）交换用列（行）交换来恢复。-algorithm introduced in the matrix inversion process is very common, which are mainly used for Billboard matrix. In accordance with the definition of the method of calculating multiplication, seriously affecting the performance. The need for a large number of Billboard matrix operations, matrix inversion optimization can significantly improve performance. Here we introduce the matrix inversion algorithm called full-elected PCA Gauss-Jordan and France. Gauss-Jordan and France (all elected PCA) inversion of the following steps : First, for k from 0 to n-1 for the following steps : from the first trip k, k started out the bottom right corner Subarray largest absolute selected elements, and element remember meeting the line and out, the adoption OK exchange and the exchange out of its exchange
Date : 2025-12-29 Size : 3kb User : 刘亮
[Crack Hack] Hill DL : 0: Hill加密算法的基本思想是将l个明文字母通过线性变换将它们转换为k个密文字母。脱密只要做一次逆变换就可以了。密钥就是变换矩阵本身。即 M=m1m2……ml Ek(M)=c1c2……cl 其中 c1=k11m1+k12m2+……+k1lml c2=k21m1+k22m2+……+k2lml …… cl=kl1m1+kl2m2+……+kllml 通常对于字母加解密，使用mod 26的方法。以上线性方程可以采用矩阵表示。 -Hill encryption algorithm the basic idea is to express the letter l a linear transformation through them is converted to k-secret alphabet. Off to do a secret as long as the inverse transform it. Key is the transformation matrix itself. That is, M = m1m2 ... ... mlEk (M) = c1c2 ... ... cl which c1 = k11m1+ K12m2+ ... ...+ K1lmlc2 = k21m1+ K22m2+ ... ...+ K2lml ... ... cl = kl1m1+ Kl2m2+ ... ...+ Kllml For encryption and decryption usually letters, use the method of mod 26. Above linear equations can be used express matrix.
Date : 2025-12-29 Size : 140kb User : wildkaede
[Crack Hack] Cipher DL : 0: 置换密码算法的原理是不改变明文字符，只将字符在明文中的排列顺序改变，从而实现明文信息的加密。置换密码也叫换位密码。试编程实现矩阵换位密码。它的加密方法是将明文中的字母按照给定的顺序安排在一个矩阵中，然后用根据密钥提供的顺序重新组合矩阵中的字母，形成密文。例如，明文为attack begins at five，密钥为cipher，将明文按照每行6个字母的形式排在矩阵中，如下形式： a t t a c k b e g i n s a t f i v e 根据密钥cipher中各字母在字母表中出现的先后顺序，给定一个置换：根据上面的置换，将原有矩阵中的字母按照第1、4、5、3、2、6的顺序排列，则有下列形式： a a c t t k b i n g e s a i v f t e 从而得到密文：aacttkbingesaivfte 解密过程类推。 -The principle of permutation cipher algorithm is to change the order of characters in plaintext without changing the plaintext characters, so as to realize the encryption of plaintext information. Permutation cipher is also called transposition cipher. Programming to achieve matrix transposition password. Its encryption method is that the letters in the plaintext are arranged in a matrix according to a given order, and then the letters in the matrix are re assembled in the order provided by the key to form a ciphertext. For example, the plaintext is attack begins at five, the key is cipher, and the plaintext is placed in the matrix in the form of 6 letters per row, as follows: A, t, t, a, C, K B, e, G, I, N, s A, t, F, I, V, e According to the order in which the letters in the key cipher appear in the alphabet, a permutation is given: According to the above permutation, the letters in the original matrix are arranged in the order of first, fourth, fifth, 3, 2 and 6, and the follo
Date : 2025-12-29 Size : 1kb User : 1