db22excel

Various instrumentation tests for ConversationList.

使用MD5算法对数据和文件进行加密，信息安全(Using the MD5 algorithm to encrypt the data and documents, information security)

title=Windows NT/2000/XP 虚拟磁盘驱动程序 memo=将一个或多个文件模拟成物理磁盘。-title=Windows NT/2000/XP simulated disk drive memo=let one or more file simulate a physical disk

大数计算在公钥加密中起到了重要的作用，如何操作大数呢，该程序也许能帮你解决这个问题有所帮助。-calculated in the end, the public key encryption plays an important role in the operation of large numbers do, the program may be able to help you resolve this problem some help.

SHA-256源代码，三个对外的函数：void SHA256Init (SHA256Context *sc) void SHA256Update (SHA256Context *sc, const void *data, uint32_t len) void SHA256Final (SHA256Context *sc, uint8_t hash[SHA256_HASH_SIZE]) 第一个函数初始化，第二个函数输入要hash的字符串，第三个函数输出结果(SHA-256 source code, three external function: void SHA256Init (SHA256Context* sc) void SHA256Update (SHA256Context* sc, const void* data, uint32_t len) void SHA256Final (SHA256Context* sc, uint8_t hash [SHA256_HASH_SIZE]) The first function is initialized, the second hash function, enter the string, the third function of output)

题目：某个公司采用公用电话传递数据，数据是四位的整数，在传递过程中是加密的，加密规则如下： 　　　 每位数字都加上5,然后用和除以10的余数代替该数字，再将第一位和第四位交换，第二位和第三位交换。 1.程序分析： 2.程序源代码：(Topic: a company USES the public telephone relay data, data is four integers, in the relay in the process is encrypted, encryption rules are as follows: Each Numbers add 5, then use and divided by the number of 10 instead of a remnant, then the first and fourth exchange, the second and third exchange. 1. The program analysis: 2. The source code:)

说明：  这是基于希尔密码基础上的一套matlab实现的加密解密程序(This is based on the Hill password matlab on the basis of a set of procedures to achieve the encryption and decryption)

置换代换密码体制的S-P盒的发生器，能随机产生S盒和P盒，用于置换代换密码体制的加密解密(replacement substitution Cryptosystem S-P boxes of generators, can generate random boxes S and P boxes for the replacement substitution Cryptosystem encryption and decryption)

（1）为班级学生花名册建立开桶或闭桶散列表。 （2）友好性：界面要友好，输入有提示，尽量展示人性化。 （3）可读性：源程序代码清晰、有层次。 （4）健壮性：对输入的数据有纠错处理。((1) class roster for the establishment of open or closed barrels barrels hash table. (2) friendly: the interface should be friendly, to bring in people with tips, try to show humanity. (3) readability: source code clear, there are levels. (4) robustness: the input data are error-correcting processing.)

用C语言写的100行DES加密算法，学习C语言和密码算法的好例程。-C language written in 100 lines DES encryption algorithm, C language learning algorithm and password good routines.