有密码的加壳源码.只是简单的介绍下壳方法.牛人见笑了

由于BT老师的要求，非要将64位DES算法改编成16位的DES算法，小生在这里献丑了。-as teachers, add to the 64-bit DES algorithm adapted into 16 of the DES algorithm, Niche in a shortcoming here.

实现数据库安全编程,写了一个MD5的加密库-Database Security Programming realize, write a MD5 encryption library

大整数运算的实现-large integer arithmetic Implementation

ieee一种基于混沌的新加密方法An Image Encryption Scheme Based on Chaotic Map - In this paper, a novel block digital image encryp- tion scheme based on a chaotic coupled map lattices (CML) is reported. Within this scheme, an original image is decomposed into sub-blocks with a given size, and an external secret key with 192-bit is used and mapped to the system parameters, which are employed to generate a spatiotemporal chaotic binary sequence matrix to encrypt the block original image. Besides, the former sub-block encrypted result will be acted as a feedback to the following sub-block encryption proc- ess. The proposed scheme is described in detail, along with the security analyses such as key space analysis, sensitivity analysis, information entropy analysis and correlation coefficients analysis of adjacent pixels. The computer simulation results indicate that the suggested image encryption scheme has some properties desir- able in a good security

SIMPLOGIN

twofish的加密算法-twofish encryption algorithm

扩展ASE算法delphi-expended ASE algorithm for Delphi

C_MD5 是一个用C写的标准MD5加密算法,使用简单，快速

DES 加密系统的 C 语言源代码，实现了简单的DES加密系统。-DES Encryption System C language source code, a simple realization DES encryption system.

128位(或192或256bit该代码以128为例)的密钥长度和分组长度，数据分组（输入的明文），先进行逐比特异或（AddRoundKey） 运算。然后通过循环十次非线性代换（SubBytes）、行变换（ShiftRows）、列变换（MixColumns）、逐比特异或【最后一轮不进行列变换】 的过程，输出128位（或192或256bit）数据即是密文。这就是加密过程。之后进行之前的逆过程，即可得到明文，此为解密过程。