密码学的数字签名算法 来自国外教材

DES算法的标准-DES algorithm standard

What Does the code DO? Sometimes we may desire to hide our file contents from others.One of the possible way is encrypting these files.Here a simple encryption technique is used(In VB - The same technique can be implemented in "c" also.) Program flow Explained * Open the File to be encrypted for Binary Access Read(Say Source File) * Open a temparory file where encrypted data is stored for Binary Access Write(Say Destination File) * Loop through the Source File Byte by Byte * For each byte read from the file, Complement the data. (Using Not operator (in C we have to use "~" operator) * Write Complemented Data to Destination File * Delete the Source File * Rename Destination file as Source File(Now Encryption is over) -What Does the code DO? Sometimes we may desire to hide our file contents from others.One of the possible way is encrypting these files.Here a simple encryption technique is used (In VB- The same technique can be implemented in

现在很多J2EE应用都采用一个license文件来授权系统的使用，特别是在系统购买的早期，会提供有限制的license文件对系统进行限制，比如试用版有譬如IP、日期、最大用户数量的限制等。 而License文件中的Base64或BEA公司现在是WebLo

程序实现了大素数的判断和如果不是素数，则其可分解的最小的素数-program of large prime numbers and if the judgment is not prime, then decomposition of the smallest prime number

MD5以512位分组来处理输入的信息，且每一分组又被划分为16个32位子分组，经过了一系列的处理后，算法的输出由四个32位分组组成，将这四个32位分组级联后将生成一个128位散列值。 -MD5 with 512-bit packet to process the input information, and each group was again divided into 16 32-seat group, after a series of processing, the algorithm" s output consists of four 32-bit group composed of these four 32-bit Cascade Group will generate a 128-bit hash value.

RSA的类的源代码，Visual C++ 6.0实现。该算法（不是指代码）虽然有诸多缺点，但目前应用广泛。该代码的思路清晰，容易学习掌握。-RSA class

base64编解码源码，绝对可用。二机制十六进制转换-base64 encode/decode in use

BlowFish算法的压缩源码-BlowFish compression algorithm source code

这是RC5算法的实现-This is the realization of RC5 Algorithm

EXELOCK 1.83 EXE文件加密器的源代码-EXELOCK 1.83 EXE file encryption for the source code