Abstract: A method (200) of operation in a mobile communication system (100) includes: a mobile station (101) sending (207) to a visited network (103) a certified service record, provided by a home network (102), of communication services allowed to be provided to the mobile station, the service record being accompanied by or including a certificate code applied by the home network by a calculation procedure applied to contents of the service record using an authentication key; the visited network calculating (211) an authentication code for the service record using an authentication key obtained by the visited network; the visited network authenticating (212) the service record by matching (212) the certificate and authentication codes; and the visited network providing (215) communication services to the mobile station based upon the authenticated service record.

Abstract: A method (200) of operation in a mobile communication system (100) includes: a mobile station (101) sending (207) to a visited network (103) a certified service record, provided by a home network (102), of communication services allowed to be provided to the mobile station, the service record being accompanied by or including a certificate code applied by the home network by a calculation procedure applied to contents of the service record using an authentication key; the visited network calculating (211) an authentication code for the service record using an authentication key obtained by the visited network; the visited network authenticating (212) the service record by matching (212) the certificate and authentication codes; and the visited network providing (215) communication services to the mobile station based upon the authenticated service record.

Abstract: A healthcare management system integrates medical practitioners, healthcare administrators, patients and educators/students. Patient data is stored in a repository as clinical data with associated patient data. The clinical data is available for medical practitioners, educators and students without the patient data. The system is structured as an application layer accessed by user terminals and separated from the repository by a data access layer which stores details of where, and in what format, data is stored.