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Description: 维吉尼亚（Vigenere）密码为了提高密码的破译的难度，人们有发明一种多表置换的密码，即一个明文字母可以表示为多个密文字母，多表密码加密算法结果将使得对单表置换用的简单频率分析方法失效，其中维吉尼亚密码就是一种典型的加密方法。维吉尼亚密码是使用一个词组（语句）作为密钥，词组中每一个字母都作为移位替换密码密钥确定一个替换表，维吉尼亚密码循环的使用每一个替换表完成明文字母到密文字母的变换，最后所得到的密文字母序列即为加密得到的密文，具体过程如下： 设密钥 ，明文 ， 加密变换 其中 例如，M＝data security，k＝best。可以先将M分解为长为4的序列data secu rity 每一节利用密钥k＝best加密得密文c=Ek(M)=EELT TIUN SMLR。 当密钥k取的词组很长时，截获者就很难将密文破解。（我们还在计算机上就维吉尼亚密码设计的方法，编写了一个小的程序，可以运用其进行加密和相应的解密。见附录） 由于我们知识和条件所限，本学期对以上6种古典加密方法进行了学习和研究，从中我们收获颇多，我们了解古典密码学的基本原理和方法，并能够对信息进行简单的加密和解密，大大提高我们的学习文化知识的兴趣和热情，如果有条件我们在今后将进一步研究密码学。-Virginia (Vigenere) password to the password to raise the difficulty deciphering, people have invented a multi-table replacement passwords, or express a letter can be expressed as a number of secret alphabet, multi-table password encryption algorithm results will enable replacement of single table with a simple frequency analysis method failure, which Vij Caledonia is a typical password encryption methods. Virginia is the use of a password phrase (statement) as a key, every phrase has a letter as a replacement shift key password table to determine a replacement, Virginia passwords for each cycle of replacement of a complete table of explicit letters of the alphabet secret transform, get in the end secret alphabet sequence namely the encrypted ciphertext, the specific process is as follows
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Size: 1024 |
Author: god |
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Description: c＋＋编写的ns环境下关于wfq算法的仿真源代码-c++ ns prepared by the environment wfq algorithm for the simulation source code
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Size: 16384 |
Author: lin hui |
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Description: 多种算法压缩与解压缩方式，包括LZ77算法,LHA算法,算术编码arith算法,Zip算法压缩与解压缩-multiple algorithm compression and decompression, including the LZ77 algorithm, LHA algorithm, arith arithmetic coding algorithm, the algorithm Zip compression and decompression
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Size: 305152 |
Author: yuants |
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Description: ZIP文件的一个编解码算法，主要用于ZIP文件的加解密。-ZIP file of a codec algorithm, mainly used in ZIP file encryption and decryption.
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Size: 18432 |
Author: zxang |
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Description: 一个用ZIP算法实现的自解压程序制作，就像RAR的自解压以一样，不过压缩率没有RAR的好。-ZIP algorithm used to achieve a self-extracting process of production, like the self-extracting RAR to the same, but the compression rate is not a good RAR.
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Size: 171008 |
Author: 刘艳双 |
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Description: Implement Encryption/Decryption of DES
algorithm.-Implement Encryption/Decryption of DESalgorithm.
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Size: 33792 |
Author: li |
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Description: Delphi常用数值算法集：Delphi常用数值算法集.ZIP-Delphi set numerical algorithm used: Delphi common set numerical algorithm. ZIP
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Size: 25592832 |
Author: 石振华 |
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Description: ACMS压缩算法.zip
arc压缩工具.zip
ASH压缩算法.zip
CAB解压缩程序.zip
COM压缩算法.zip
C语言常用算法源代码.zip
HA压缩算法.zip
jac压缩算法.zip
lharc压缩算法.zip
LZHUF、LZSS、LZARJ压缩算法.zip
LZSS压缩算法.zip
lzw压缩算法.zip
Splay树压缩算法.zip
USQ压缩工具.zip
zip解压.zip
zip压缩解压范例.zip
哈夫曼编码树算法.zip
哈夫曼压缩解压算法.zip
使用LZ压缩算法的完整应用.zip
文件压缩控件.zip
一个含多种压缩算法的程序包.zip
一个压缩工具.zip
以上全解压/压缩相关的算法!-ACMS compression algorithm. Ziparc compression tools. ZipASH compression algorithm. ZipCAB decompression procedures. ZipCOM compression algorithm. ZipC language commonly used algorithm source code. ZipHA compression algorithm. Zipjac compression algorithm. Ziplharc compression algorithm. ZipLZHUF, LZSS, LZARJ compression algorithm. ZipLZSS compression algorithm. ziplzw compression algorithm. zipSplay tree compression algorithm. zipUSQ compression tools. zipzip decompression. zipzip compression decompression examples. zip Huffman tree algorithm. zip decompression Huffman compression algorithm. zip compression algorithm using LZ complete application . zip file compression controls. zip a compression algorithm with a variety of packages. zip a compression utility. zip more than one full decompression/compression algorithm related!
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Size: 1164288 |
Author: haochao |
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Description: 现在最有效的无损压缩算法，Zip的核心源码-Now the most efficient lossless compression algorithm, Zip core source
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Size: 2048 |
Author: min |
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Description: 功能强大、包含多种算法的小波分析工具箱，须在matlab下安装-A powerful, multi-algorithm of wavelet analysis toolbox, to be installed in the matlab
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Size: 3800064 |
Author: lvhongming |
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Description: VC实现的ZIP压缩和解压缩算法,生成DLL动态链接库函数-VC implementation ZIP compression algorithm, DLL version
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Size: 270336 |
Author: 朱毅华 |
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Description: zip压缩算法,希望对一些喜欢diy的人有用。我也不是很懂-zip compression algorithm, hoping for some people who enjoy diy useful. I do not really understand them. . .
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Size: 101376 |
Author: 三生石 |
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Description: 图像几何变换算法.zip
图像几何变换算法-Image geometric transformation algorithm. Zip image geometric transformation algorithm
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Size: 32768 |
Author: 小贝 |
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Description: 用c++实现二叉树增删改查和快速排序算法.zip-With c++ realize binary tree to CRUD and fast sorting algorithm. Zip
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Size: 6144 |
Author: 唐永笙 |
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Description: VB编程资料，介绍常用数学的经典算法，自学的好帮手。,The VB programming information, and introduce a common mathematical classic algorithm, self-study is a good helper.
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Size: 182272 |
Author: shigm |
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Description: 一些关于遗传算法的期刊文献，这些文献介绍了遗传算法的计算方法,The genetic algorithm journals, the literature describes the calculation method of the genetic algorithm
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Size: 3576832 |
Author: maqian |
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Description: 8051 PID算法.zip STC12C5A60S2单片机 晶振：11.0592MHz-8051 PID algorithm. Zip STC12C5A60S2 microcontroller crystal: 11.0592MHz
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Size: 52224 |
Author: 唐堂棠 |
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Description: 稀疏矩阵算法及其程序实现(杨绍祺+谈根林)，有解决稀疏矩阵需要的朋友可以好好认真的看一下-Sparse matrix algorithm and program implementation (Yang Shaoqi+ Tan root forest), solve sparse matrix can be a good friend in need a serious look at
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Size: 5066752 |
Author: even |
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Description: MATLAB image mosaic algorithm.zip
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Size: 617472 |
Author: zlzmxy |
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Description: 自适应网格算法的MATLAB实现，及算法比较-Adaptive Mesh Algorithm.zip
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Size: 1262592 |
Author: 姜东 |
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