The CSA, is born as integration between the National Paper of the Services and the others currently in use or course of I use. The idea has been that one to create an advanced service that, “authenticating legal” the holder could render easy and simple to the citizen the access to the services puttinges in net from the Public Administrations, Health and Private.Integrando Companies to the simple function of authentication also other potentialities the CSA has become “Legal” Digital Company; Credit card, Ticket for Transports, Parkings, Cinema, Discotheques etc; Smart Card for Land Digitalis; Telephone card; Tax identification number; etc is been born therefore the Paper of the Papers (com'è be defined) that through an ambitious and innovative plan it has given the way to the Dervizi Advances you of Social Connettività (SACS)