凯撒和维吉尼亚加密方法，两种算法都不是很复杂，基本原理也相似所以都写入一个文件中来表示。...

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The Cryptography API: Next Generation(CNG) is a new and agile framework in Windows Vista, which implements an extensible provider model that allows you to load a provider by specifying the required cryptographic algorithm rather than having to hardcode a specific provider. -The Cryptography API: Next Generation (CNG) is a new and agile framework in Windows Vista, which implements an extensible provider model that allows you to load a provider by specifying the required cryptographic algorithm rather than having to hardcode a specific provider.

设f(x)=1+x+x2+x5+x27，试分别写出实现下列移位寄存器的程序： 以f(x)为联接多项式的DSR； 以f(x)为联接多项式的LFSR。 可供选择的联接多项式： f1(x)=1+x+x4+x6+x30； f2(x)=1+ x3+ x31； f3(x)=1+ x6+ x31； f4(x)=1+ x7+ x31； f5(x)=1+ x13+ x31； -Let f (x) = 1 x x2 x5 x27, respectively try to write the following Shift Register : f (x) connected to the DSR polynomial; f (x) for connectivity polynomial LFSR. Connection options polynomial : f (x) = 1 x x4 x6 x30; F2 (x) = 1 x3 x31; f3 (x) = 1 x6 x31; f4 (x) = 1 x11 x31; f5 (x) = 1 x13 x31;

一个用VB写的壳！-write a VB shells!

shs加密源程序-29-57 encryption source

实现本机加密-The realization of the local encryption

快速MD5碰撞生成器，王小云改进版。这个生成器根据“构造前缀碰撞法”可以生成两个不同的文件，而这两文件的md5 sum却是一样的。 MD5 Collision Generator(win32 .exe) MD5 Collision Generator(source) -Fast MD5 collision generator, Xiaoyun Wang, improved version. The generator according to "construct the prefix collision" system can generate two different files, while the md5 sum of these two documents is the same. MD5 Collision Generator (win32.Exe) MD5 Collision Generator (source)

密码学的数字签名算法 来自国外教材-Cryptography Digital Signature Algorithm materials from abroad

条形码编码算法，可以输出多种形式条码-barcode coding algorithm, can output multiple forms barcode

利用汇编语言实现DES加密算法-using assembly language to achieve DES encryption algorithm