DSA

简单U盘加密源码，例程程序结合易语言模块实现U盘加密功能。(Simple U disk encryption source code, combined with easy language routine program module U disk encryption.)

说明：  IDEA加解密算法，实现IDEA的加密、解密，可详细输出每轮加密子密钥(IDEA encryption and decryption algorithm)

取代式密码的存在，已经超过2500年 以上，最早利 用的范例 是在西元600年 左右，内容是以颠倒的希伯來 文构成的。凯萨大帝（Julius Caesar）也曾经使用称为Caesar密码法。方法为将每个字母用其后的第三个字母來 取代。(Replace passwords existence, has more than 2,500 years or more, the first example is using a range of about the year 600 AD, the contents of the text is upside-down Heber future composition. Great Caesar (Julius Caesar) has also been known as the Caesar cipher using the method. Method is used then each letter is replaced by the third letter.)

利用凯撒密码对中文文档及英文文档进行加密和解密，同时英文文档加密区分大小写。(The Kaiser password is used to encrypt and decrypt Chinese documents and English documents, and the encryption of English documents is very small and case sensitive.)

一些重要的加密算法的实现---主要是针对大学密码学课程中的算法实践，例如： 维吉尼亚密码，置换密码，移位密码-Some key encryption algorithm--- mainly aimed at the realization of the University of cryptography algorithms for practical courses, such as: Virginia password, replacement password, password, and so shift

最常见的流密码RC4的visual c++实现。希望对大家有帮助。-RC4 cipher

KeePassX用于保护密码的安全，使用了高强度的加密数据库-KeePassX password protection for the safety of the use of high-strength encryption database

古典密码算法中的单表代换密码算法、移位密码算法、Vigenere密码算法。算法比较简单，用命令的方式。可以随机生成明文和密钥。-Classical cryptographic algorithm in a single table substitution cipher, transposition cipher, Vigenere cipher. Algorithm is relatively simple, way to use the command. Can be randomly generated and the key explicitly.

一个很好的使用 ROT13 算法加密和解密数据的算法(A good algorithm using ROT13 algorithm to encrypt and decrypt data)

RSA MD5 Message Digest rsa md5消息摘要算法,VC实现,供大家参考-RSA MD5 Message Digest rsa md5 news digest algorithm, VC, for your reference