nice crypt method, if you are a delphi programmer you really love this because is very useful code

RC5 block cipher. This implementation is FREEWARE, you may use this implementation freely. You have permission to modify any of the files included in this archive provided you do not redistribute these files. If you wish to redistribute these

Delphi:采用BASE64算法流加密，编码多个字节，可以编码奇数字节和基数字节，把编码好的块写到流中，当然也可进行BASE64算法流的解密，解密的数据输入到流中，还可进行BASE64算法字符串加密，字符串解密等，比较全的BASE64加密与解密实例，仅供参考。 -Delphi: a stream cipher algorithm using BASE64 encoding a plurality of bytes, and the base may be encoded odd byte

Forge Cipher component for delphi. Very easy in use.