DesSecurity

DES与RSA算法的解析与推演。不是单纯理论的讲解，带着一些应用的角度让对密码学有兴趣的人能很容易理解略显深奥的密码算法。-DES and RSA algorithms with analytic deduction. Not purely theoretical explanations, with the perspective of some applications of cryptography to allow those who are interested can easily understand the slightly esoteric cipher.

AES的一个C语言编译代码，其中密码长度为128比特(aes 128bits encrption and decrption)

说明：  DES二值图像加密以及AES图像加密算法(DES binary image encryption and AES image encryption)

盲人输入法，利用微软的TTS实现盲人书法-blind input method, using Microsoft"s TTS achieve blind calligraphy

实现数字签名Elgamal算法，该算法是在rsa算法基础上的变形算法。(Digital signature Elgamal algorithm, the algorithm is in the rsa algorithm on the basis of the deformation algorithm.)

AES加密以及解密实现，这是一个AES文件加密软件，用VC++ MFC编写，里面有详细的源代码以及加密和解密的具体实现方法。(AES encryption and decryption to achieve, this is a AES file encryption software, written using VC++ MFC, which has detailed source code and encryption and decryption of the specific implementation method.)

从一个随机文件读取256字节数据形成数据区DArea，再应用洗牌法所给的方法生成0~255的一个全排列DTab。试分别写出"求DArea中全部数据经 （1）以DTab为S-盒； （2）以DTab为P置换 -from a random file read 256 byte data area DArea form data, re-shuffling in law application to the formation of 0 ~ 255 DTab a full array. Try to write were "seeking DArea by which all data (1) DTab S-boxes; (2) DTab replacement for the P

硬件求解平方根源代码加密 (硬件求解平方根的，将license添加到原有的MaxplusII或QuartusII的license中就可以直接使用，但源代码加密。altera提供 )-solving square root of the hardware encryption code (square root of the hardware solution will be added to the original license MaxplusII or Quartus II of the license which can be directly used, but the source code encryption. ALTERA provide)

一个很有用的密码学课程设计资料，希望对从事密码学研究的人有所帮助。(Cryptography Course Design Information A useful, I hope to engage in research into cryptography help people.)

MD5算法的ASP实现． 它在MD4的基础上增加了"安全-带子"（Safety-Belts）的概念。虽然MD5比MD4稍微慢一些，但却更为安全。MD5也为一种非常优秀的中间技术。-MD5 algorithm ASP. It MD4 increase on the basis of "safety-belt" (Safety-Belts) concept. Although MD5 than MD4 slightly slower, but more secure. MD5 also as a very good intermediate technology.