哈希数据编码解码实现（Hash） 需安全openssl等安全证书

密码学的经典程序-cryptography classic procedures

this code implement an Order Preserving Encryption Scheme (OPES).

des，c环境下的，希望站长早日通过，贵站的宝贵资料对于我的学习有很大的帮助，感谢！-des, under the c environment, hoped stationmaster soon will pass, the expensive station precious material will have the very big help regarding mine study, the thanks!

Simple steganography program written in Python. The program writes and reads information to/from 24 bits bitmaps.

汇编写的md5加密算法-Md5 encrypt algorithm written in ASM

IDEA加密算法属于数据块加密算法(Block Cipher)类。IDEA使用长度为128bit的密钥，数据块大小为64bit。-IDEA encryption algorithm is data block encryption algorithm (Cipher Block) category. IDEA use of the length of the 128 bit key, the data block size for 64bit.

它也可以用来解除Adobe Acrobat PDF文件密码的工具，它可以帮助解决加密PDF无法编辑和复制/打印的问题，支持所有版本的Acrobat加密(包含7.x)，也支持128位加密。 -It also can be used to lift the Adobe Acrobat PDF files password tool, it can help to solve encrypted PDF can not edit and copy/print the questions, and support all versions of Acrobat encryption (including 7.x), also supports 128-bit encryption.

RSA公钥加密，用C实现，大家可以参考一下-RSA public key encryption, using C to achieve, we can refer to

一个用VB写的壳！-write a VB shells!

把信息隐藏到图片中，比加密更安全-hidden message to the pictures, more secure encryption