DES( Data Encryption Standard)算法，于1977年得到美国政府的正式许可，是一种用56位密钥来加密64位数据的方法。DES算法以被应...

CRC-16算法的C语言实现（以常见的CRC-ITU为例引出的比特型算法）。-CRC-16 algorithm of the C language (in common CRC-ITU as an example of bit-based algorithm for extraction).

包括密钥盘制作软件、LIB、DLL 加密模块 各种语言调用加密模块的例子程序、网络注册软件等-including key disk production software, LIB, DLL encryption modules in various languages called encryption module example, Web registration software

数字证书处理程序-procedures for handling digital certificates

MIME(Quoted-Printable & Base64) 编码解码程序-MIME (Quoted-Printable Base64) codec procedures

The class has a methode named make_CRC that gets a byte stream and start/end offsets then calculate and return a 16 bit CRC according to determined POLYNAMIAL.The POLYNAMIAL is a private field of the class.

一个3des算法的库文件和使用库文件的例子- A 3des algorithm storehouse document and use storehouse document example

crypt++ 3.2版本，含有几十个加密算法实现-crypt++ 3.2 version, it has realised tens of encrypting algorithms

应用背景在这篇文章中，我将介绍一个简单的源代码，让您的数字签名PDF文档和修改它的元数据。我会用优秀的 自由港；iText  ；图书馆：itextsharp，可以下载 ；这里。你需要2008个视觉工作室能够打开和建设该项目。关键技术itextsharp提供了很多有趣的功能，创建和操纵PDF文件，但在这篇文章中，我们将只使用数字签名功能。我也会用一些功能来操作# PKCS 12证书。你唯一需要知道的是，我们的数字签名将使用从蛋白提取私钥# 12证书。

java自行开发rsa-developed rsa

The Advanced Encryption Standard (AES) specifies a FIPS- approved cryptographic algorithm that can be used to protect electronic data.  The AES-128 pipelined cipher module uses AES algorithm which is a symmetric block cipher to encrypt (encipher) information. This module is optimized for speed as it pipeline hardware to perform repeated sequence called round