“When I took office, only high energy physicists had ever heard of what is called the Worldwide Web… Now even my cat has its own page” (Bill Clinton, 1996) Only 20 years ago, mostly big companies had access to the Internet in order to ex-change information for the worldwide production and transfer of financial services. The big change has come with new data based applications and an enlargement of broadband connections in the beginning of the 21th century: It is now possible to provide bigge