Abstract: Systems and methods of searching a plurality of data items which include selected data items with respective access tags defining access criteria for those data items. A search request token including search criteria and data identifying a user from an entity associated with the user is received. The user by verified by seeking confirmation that the user is a subscriber with a communications network. Data items from the plurality of data items which are potentially relevant to the search criteria are identified. For any identified data items having access tags, determining whether the verified user has permission to access the identified data items with reference to the data of the search request token. Search results including an indication of identified data items but excluding any such data items for which it is determined that the user does not have permission to access are generated.

Abstract: A computer, such as a WINDOWS® operating system-based PC, has associated with it a Subscriber Identity Module (or SIM), such as of the type used in a GSM cellular telephone system. The SIM can be authenticated by the telephone network, in the same way as for authenticating SIMs of telephone handset users in the network, and can in this way authenticate the user of the PC or the PC itself. Such authentication can, for example, permit use of the PC in relation to a particular application which is released to the PC after the authentication is satisfactorily completed. The application may be released to the PC by a third party after and in response to the satisfactory completion of the authentication process. A charge for the session can be debited to the user by the telecommunications network and then passed on to the third party.

Abstract: A computer, such as a WINDOWS® operating system-based PC, has associated with it a Subscriber Identity Module (or SIM), such as of the type used in a GSM cellular telephone system. The SIM can be authenticated by the telephone network, in the same way as for authenticating SIMs of telephone handset users in the network, and can in this way authenticate the user of the PC or the PC itself. Such authentication can, for example, permit use of the PC in relation to a particular application which is released to the PC after the authentication is satisfactorily completed. The application may be released to the PC by a third party after and in response to the satisfactory completion of the authentication process. A charge for the session can be debited to the user by the telecommunications network and then passed on to the third party.

Abstract: A computer, such as a Windows-based PC (10), has associated with it a Subscriber Identity Module (or SIM) (12), such as of the type used in a GSM cellular telephone system. The SIM (12) can be authenticated by the telephone network (16), in the same way as for authenticating SIMs of telephone handset users in the network, and can in this way authenticate the user of the PC (10) or the PC (10) itself. Such authentication can, for example, permit use of the PC (10) in relation to a particular application (22) which is released to the PC (10) after the authentication is satisfactorily completed. The application may be released to the PC (10) by a third party after and in response to the satisfactory completion of the authentication process. A charge for the session can be debited to the user by the telecommunications network and then passed on to the third party.