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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
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AES加密解密,的一个类,按照AES标准算法写的,做了小小优化。希望对学习AES的同学有用处,文件做了详细的注释说明。-AES encryption and decryption, in a category, in accordance with standard AES algorithm written, and done a little optimization. AES hope to the students learn useful, document a detailed ex
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实现文件CRC加密的VB程序,运行速度快,算法优化占CPU很少。-CRC files encrypted VB program, run faster, algorithm optimization for the CPU rarely.
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RC6优化算法,是一个优化的加密算法,是AES候选算法之一-RC6 algorithm optimization, optimization is an encryption algorithm, AES is a candidate for one
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最佳化過的twofish演算法,想學習twofish密碼的千萬不能錯過-optimization algorithm by twofish, twofish want to learn the passwords should not be missed
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实现简单的DES算法,并对密钥转换进行了少量的优化-simple implementation of the DES algorithm, as well as key change for a small number of optimization
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优化过得RC4加密解密原代码,有向研究加密算法的朋友可以下载研究研究-optimization flies RC4 encryption and decryption of the original code, to study the encryption algorithm can be downloaded friends studies
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SHA1算法的MCS-51平台实现,原创代码,专门为8位机优化,C语言和汇编与语言混合编程。完整KeilC工程,有测试代码。
优化后速度:一次SHA1(64字节),66363个指令周期,对应16MHz DS80C320 16ms
代码空间:字节,C支持库148字节(可覆盖)
数据空间:xdata 320(0x140)字节(可覆盖),data 34字节(可覆盖)
-SHA1 algorithm MCS-51 platform, original code, specificall
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转载:TripleDes算法实现提供的TripleDes可以实现3DES在两种模式下的2key/3key的加、解密。在速度优化和内存控制上都做了优化。有任何问题可以发mail给我。我的mail是:name_caesar@msn.com- Reprint: The TripleDes algorithm realization provides TripleDes
may realize 3DES under two kind of patterns 2key/3key Canada, the
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VC++实现RSA算法 进行了部分优化,优化地方参考:程序中间的注释-VC++ to achieve some of RSA algorithm optimization, optimization of the local reference: the middle of the Notes program
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用VB进行的MD5算法,主要对速度进行了优化,使用了VB指针技术加快算法-VB carried out using MD5 algorithm, mainly on the speed of optimization, the use of technology to speed up the algorithm pointer VB
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IDEA算法源码,经过优化,含有测试用例-IDEA algorithm source code, after optimization, containing the test case
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Rijndael算法源代码,经过性能优化,含有测试用例-Rijndael algorithm source code, through the performance optimization, containing test cases
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针对16bit cpu优化过的aes算法,比优化前快1倍。-Optimized for the 16bit cpu' s aes algorithm, a times faster than before optimization.
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通过编写程序实现了公钥密码算法RSA的加密与解密功能,并进行了一定的优化,内含报告。-Achieved through the preparation process RSA public key cryptographic algorithm for encryption and decryption functions, and make a certain amount of optimization, containing the report.
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一些经过优化后的VC++加密解密算法,生成加密类文件,然后可以调用,早两年的代码,但现在仍然很有用。-After optimization of the number of VC++ encryption and decryption algorithm to generate encrypted class files, then you can call the code two years ago, but still useful.
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base64编码算法及unbase64解码,算法优化,原创经典-Base64 coding algorithm and unbase64 decoding, algorithm optimization, original classic
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椭圆曲线密码体制的优化与设计,对研究加解密算法具有重要参考价值-Optimization and design of the elliptic curve cryptosystem of important reference value, the study of encryption and decryption algorithm
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蚁群算法、神经网络算法、粒子群算法-Ant colony algorithm, neural network algorithm, particle swarm optimization. . . .
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粒子群优化算法的详细算法流程,流程图的形式展现。-Particle swarm optimization algorithm with the algorithm process, to show the form of a flowchart.
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