The following conference presents Internet security issues in an entertaining and educational way by the use of interactive demonstrations about the installation and mechanism of hacking programs. It is not necessary to be an expert to know how to use these programs in order to attack individuals and organizations by sending Trojans, forging e-mail messages and stealing passwords. Fortunately, the practice of some important countermeasures, like installing security applications and updating software, will help us to protect ourselves from these criminal attacks.