The Web we know is based on centralized resources, the so called 'silo' approach. Offering particular services would usually involve having to create dedicated accounts for each user, tying and limiting the user to this particular service and/or resource. Furthermore, users have no control over how their personal account data are used by the service. Recently there have been numerous cases where social networks have made public certain private details of their users, which made people realize the importance of online privacy and public data control. MyProfile intends to provide a solution for managing the numerous accounts and profiles that users have on the Internet. Its main purpose is to provide a unified user account, or simply 'user profile', which as opposed to current 'silo' profiles, would really be under the user's control. The proposed solution addresses the shortcomings of the silo-based user accounts, cross-domain authentication and identification, as well as data sharing and propagation. In order to perform authentication and identification, MyProfile is based on the recent standard proposed by W3C's WebID Incubator Group, and the Friend of a Friend (FOAF) ontology. Combining WebID and FOAF offers users the possibility to directly participate in their interactions across the Web, by allowing them to use a unique identity (pointing to a unique user account / profile), across multiple domains and services. This approach comes in contrast to current practices, where the Web centralizes all our personal data through the multitude of online forms we have to fill in, instead of allowing users to carefully select which information they want to make public when accessing a particular service.