3des

一个周期3的多表代替密码，第1个表由密钥字法产生（密钥字自拟），第2个表由洗牌法产生（注意，字母a~z与数字0~25一一对应），第三个表由公式法产生（数学公式自拟，注意它须是Z26上的一个一一变换）(a cycle of three multi-table instead of passwords, a table by key word method, (key word from the intended), Table No. 2 produced by shuffling method (note, a letter with a number of z ~ 0 ~ 25 he gathers), 3rd tables generated by the formula (from the proposed mathematical formula, it should pay attention to the Z26 is a transformation on January 1))

说明：  使用维吉尼亚密码进行控制台编程，实现对英文文本文件的加解密！(Virginia password using the console program, to achieve the English version of the document encryption and decryption!)

流密码中RC4算法的加密解密的c程序实现(stream cipher)

说明：  混合加密系统，支持多种加密方式混合加密系统，支持多种加密方式(Hybrid encryption system)

说明：  用于数字、密码等字符的加密和解密，用于数字、密码等字符的加密和解密，用于数字、密码等字符的加密和解密，用于数字、密码等字符的加密和解密(For numbers, passwords, encryption and decryption of characters for numbers, passwords, encryption and decryption of characters for numbers, passwords, encryption and decryption of characters for numbers, passwords, encryption and decryption of characters)

生成RSA密钥，将密钥生成后`，存入文件中(RSA key generation, key generation `stored in the file)

整体思路 用createkey.java 文件来产生秘钥，用jiami.java 文件来实 现加密，用jiemi.java 文件来实现解密,用BigInteger.java 来实现 大数的表示及运算，用rsa.java 来实现前端图形界面显示。有关函 数见五个文件里的具体实现。 (The overall outlook createkey.java document used to generate secret keys, used to achieve jiami.java file encryption, used to achieve jiemi.java documents declassified by BigInteger.java to achieve expression of large numbers and calculations, using rsa.java to achieve front-end graphical interface display. Related functions, see the five concrete realization of the document.)

通过MATLAB的编程，实现对图片的加密，奇异值的分解，离散变化，程序简单，明了。(Through MATLAB programming, realize the image encryption, singular value decomposition and discrete changes, procedure is simple, clear.)

可以对文件进行加解密，这是自己编写的实验作业(Can encrypt and decrypt files, it is their job to prepare experimental)

说明：  ECC实现加密解密功能，系统参数的生成！(ECC to achieve encryption and decryption functions, system parameter generation!)