The present invention provides a method that facilitates secure cross domain mashups in an efficient fashion. The invention allows a first entity, the Masher, to establish at a second entity, the User, a secure mashup by obtaining information from, or taking actions at, a third entity, the Mashee, by using a novel twist to the SSL protocol. The invention is further extended to secure a hub and widget architecture, which allows one Masher to establish at a User, communication with several Mashees. Mutual authentication of all entities, key distribution for authentication, privacy and code verification and dynamic authorization based on the certificate information are provided by the invention.