SECURING CONTACT INFORMATION

摘要

A method of controlling user access to contact information associated with public user identities (IMPUs) registered in respect of the user's subscription within an IP Multimedia Subsystem. The method comprises installing into a Serving Call/Session Control Function assigned to the user, one or more contact information access policies, the contact information access policy or policies defining if and under what circumstances the user can view or delete contact information. Upon a request by the user to view and/or modify said contact information, the Serving Call/Session Control Function evaluates and enforces these contact information policies.