multimedia user authentication device, user equipment, method for authenticating a user accessing a multimedia domain through an access network, and service entities, proximal and interrogating

摘要

"DEVICE FOR AUTHENTICATION OF A USER MULTIMEDIA, USER EQUIPMENT, METHOD FOR AUTHENTICATING A USER ACCESSING A MULTIMEDIA DOMAIN, ACCESS, AND INTERROGANT". The present invention provides an inter-domain authentication mechanism by performing cross-domain authentication for a given user between an access network domain and a Multimedia domain, this inter-domain authentication mechanism being simpler than currently existent. and applicable where a user has been authenticated by the access network. Therefore, there is a new feature provided according to the invention, namely "Implicit Authentication for Multimedia domain", which can be implemented as a dedicated Multimedia Authentication device in close co-operation with a subscriber server, or be completely integrated into said subscriber server. To this end, a new device, new user equipment, and a new method are provided, all arranged to reuse authentication data between different networks, or between different technology domains, and with the help of other entities in a Multimedia domain. according to present standards.