Abstract: An identities collaboration system that comprises a Personal Service Provider (PSP) system for supplying specific user related personal service(s); means for assigning two different data files to each user opting-in to the PSP system, wherein one data file contains data representing the user identity at the PSP system and it assigned on a first domain, and the other data file(s) contains data representing the information regarding whether the user is opted-in, or another identity number that is related to the user identity at the PSP, and is assigned on a second domain. The data files are stored within the terminal of each of the opting-in users.

Abstract: A system is disclosed for messaging over a data network, such as the Internet and interactive TV, which allows every registered user to generate and update one or more user portfolio(s) containing information relative to Providers and/or individuals of which the user is willing to view their messages. The messages are displayed inside the space of the webpage where usually banners are shown. The system may provided benefits to the user upon displaying messages with commercial value to him. The disclosed messaging system allows an easy and effective communication path between providers and users any time publicly or privately in the banner area of a web site, which does not occupy additional space on the user's browser, and does not require the user to load another application besides his browser.