doc-encryption

1. Basic description
================
Passwords are stored as an hash (md5 sum encryption) in the database. Therefore the class HashEncryption is written to convert any string to md5. The user then sends his password as an md5 sum to the server.

2. Used library
==============
The Library QCryptographicHash (http://doc.trolltech.com/4.3/qcryptographichash.html) was used.

3. How-to-use
===========
-Create object of Hashencryption class
-call method calcmd5(QByteArray string) to get encrypted result