针对Logistic映射，实现数字图像迭代混沌加密算法

使用vb的方法加密文本-use of encryption text

另类密码登录窗体（拼图），只有正确拼出结果图才能进入。-alternative Password Login Window (puzzles), the only correct map decorated results can be admitted.

在ECC椭圆曲线上的一种加密算法，是现在比较流行的一种非对称加密算法。-ECC Elliptic Curve in an encryption algorithm is more popular now a non-symmetric encryption algorithm.

microsoft2007的下载密匙。用它来安装。否则无法安装microsoft2007-Key microsoft2007 download. Use it to install. Otherwise it is impossible to install microsoft2007

希尔排序算法: 基本思想：将整个无序序列分割成若干小的子序列分别进行插入排序。 序列分割方法：将相隔某个增量h的元素构成一个子序列。在排序过程中，逐次减小这个增量，最后当h减到1时，进行一次插入排序，排序就完成。增量序列一般采用：ht=2t-1,1≤t≤[log2n]，其中n为待排序序列的长度。-Hill sorting algorithm: the basic idea: the whole sequence disorder is separated into a number of small sub-sequences respectively Insertion Sort. Sequence segmentation method: h will be separated by an incremental elements constitute a subset of sequences. In the sort process, the successive decrease of the increment, and finally reduced to one when h when an insertion sort, sort completed. Incremental sequence generally use: ht = 2t-1, 1 ≤ t ≤ [log2n], in which n is the length of sequence to be sorted.

程序使用C++展示相当强的XOR加密。 当它unencrypting文件时，包括EOF验错和自动侦查。程序很好被提供并且做在串类建立的好用法。-Program Uses C++ to Demonstrate A Fairly Strong XOR Encryption. Includes EOF error checking and automatic detection of when it is unencrypting a file. Program Is Documented Well And Also Makes Good Use of the Built In String Class.

crytage and decryptage with rsa 64 bits

ElGamal算法不仅用于数据加密也能用于数字签名，其安全性依赖于有限域上离散对数问题的计算。该方法的关键。首先，选择一个素数P，两个随机数，G和G，X，X＜P，计算Y = G ^ X（MOD P），其公钥Y，G和P的私钥X G和P的一组用户共享。ElGamal数字签名。信息签署M，先选择一个

des差分密码分析实现源代码-des differential cryptanalysis achieve source code

Base64编码与解码，MD5加密源码 DEMO-Base64 encoding and decoding, MD5 encryption source DEMO