After eight years the skype communication protocol has been reverse engineered. See for yourself:
http://www.enrupt.com/index.php/2010/07/07/skype-biggest-secret-revealed
One of the hard tasks in the daily live of an IT administrator is to ensure that the network and the server are secure. The perfect security is not possible. There will always be some small leaks either provoked through the behavior of the user in version 1.0 or the administrator of the system. Not to mention design leaks in the software itself. Most environments are too large and too complex for a manual checkup of all security patches and service packs. One other factor is most users need some higher rights on their machine to do their work. This often results in disabling the windows firewall. These two scenarios are big the root of all evil.
As we all know the major issue with security is the user itself, because current security systems don’t consider the human factor. Most of the security measures neglect the human limitation in the real world with the result that the users are annoyed by the system. Annoyed users stop paying attention or even worse they stop considering the whole security aspect of the system they are using. OpenSSH 5.1 implements a new (experimental) feature based on an innovative visualization technology, which care about the human being.