Playfair源代码是很简单的，随着网络的现有的版本是不同的…

hash算法的vb实现.很好用!-hash algorithm to achieve the vb. With good!

C_MD5 是一个用C写的标准MD5加密算法,使用简单，快速

Base64的Decode和Encode-Encode and Decode

在卡片上管理密码的工具。密码被标注并集体加密存储在卡片上。因此这是一个安全存储密码的方法-on the card password management tool. Tagging password encryption and collective memory on the card. So this is a safe method of storage of passwords

使用单片来进行CRC校验，可以位校验、半字节和字节校验-Using the single-chip to carry out CRC check, you can place check, half-byte and byte checksum

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.

一个用3DES加密文件的小测试程序！-a document using 3DES encryption small test program!

这是一个编程开发用的AVI的播放器对初学者有启发作用-This is a programming using AVI player for beginners instructive role

著名图论问题之一。邮递员从邮局出发送信，要求对辖区内每条街，都至少通过一次，再回邮局。在此条件下，怎样选择一条最短路线?此问题由中国数学家管梅谷于1960年首先研究并给出算法，故名。-Well-known graph theory problems. Postman deliver a letter from the post office proceed to require every street within the right area, at least through the time, return to post office. Under these conditions, how to select a shortest route? This issue by the Chinese mathematician Mei Gu tube study in 1960, and gives the first algorithm, hence the name.

DES算法的C语言实现，大家可以参考一下。-DES algorithm to achieve the C language, we can reference.