1. A method comprising: directing storage of subscriber data at one or more locations, the subscriber data comprising data regarding a first subscriber to a communication network; directing storage, at at least one of said one or more locations, of one or more rules for managing said subscriber data at at least one of said one or more locations; managing said subscriber data at at least one of said one or more locations on the basis of said rules; receiving a request from an entity for said data regarding said first subscriber to said communications network; processing at least one element of said subscriber data for said first subscriber on the basis of at least a first rule of said one or more rules and on the basis of a feature of said request so as to produce a modified element of subscriber data; and causing said modified element of subscriber data to be provided to said entity; wherein said feature of said request is selected from the group consisting of: the time at which the request was made; the identity of an application to which the request relates; and the type of service to which the request relates.