At present we function in an era, in which the most important role is played by the information. Everyone of us wants to know as much as possible, sometimes for some skills or data we are likely to pay plenty of money. Besides, there are people, who are responsible for organizing the data as well as analyzing them in order to observe as high profits as possible. As a result, we ought to also not forget that for instance concerning having a website of our company, there is a risk that somebody from outside would be interested in acquiring our data.