一个不错的文件加密系统，对你工作的安全大大加强。

RSA算法 :首先, 找出三个数, p, q, r, 其中 p, q 是两个相异的质数, r 是与 (p-1)(q-1) 互质的数...... p, q, r 这三个数便是 person_key，接著, 找出 m, 使得 r^m == 1 mod (p-1)(q-1)..... 这个 m 一定存在, 因为 r 与 (p-1)(q-1) 互质, 用辗转相除法就可以得到了..... 再来, 计算 n = pq....... m, n 这两个数便是 public_key ，编码过程是, 若资料为 a, 将其看成是一个大整数, 假设 a < n.... 如果 a >= n 的话, 就将 a 表成 s 进位 (s

为一个字节或字符数组或串计算md5值，内部只创建一个数组，节省分配时间，节省内存 完全是static方法，线程安全 注意对返回值的处理，见注释-for a byte array or character string or md5 value calculation, only to create an internal array, saving time allocated to save memory is completely static method, thread-safe attention to the return value, see note

对ORCLE数据库进行保护，具有很强的功能，有加密，访问，删除，等保护功能-right ORCLE database protection, and highly functional, encryption, access, deletion, such as the protection function

rsa encryption which ask a user input must me be uppercase letter-rsa encryption which ask a user input must me be uppercase letter..

MD5算法封装类-MD5 algorithm Packaging Category

sha1sum验证算法,cd分发映像文件的，sha1值得计算，验证sha1-sha1sum verification algorithm, distributed cd image files, sha1 worth calculation, the certification sha1

此小程序是MD5的加密算法，里面有详细的注释！-This small program is MD5 encryption algorithm, there are detailed notes!

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.

Inroduce the algorithm of RSA.

为歌手投票：1、检测出最高分和最低分，然后求出平均分 2、计算各个评委的打分与平均分的差的绝对值，绝对值大的为“差评委”，小的为“好评委”。 在求出最大值和最小值时还要捕获数组b的下标，即得到评委的序号-Vote for the singers: 1, detected the highest points and lowest points, and then calculated the average sub-2, calculation of all the judges scoring with an average score of poor in absolute terms, the absolute value of big is