Abstract: The invention concerns a method for supporting cashless payment as well as a payment interworking server, a mobile terminal and a computer program product for a cashless payment system. A mobile subscriber identity stored in the subscriber identification module of the mobile terminal is sent to a payment interworking unit. The payment interworking unit transmits the mobile subscriber identity to an authentication server of a mobile communication system which replies an authentication number and a signed response. The authentication number is sent to the mobile terminal which calculates a signed response and transmits the signed response to the payment interworking server. This server compares the singed responses received from the authentication server and from the mobile terminal and sends a confirmation message to a POS unit or a billing system, if the received signed result is correct.

Abstract: The present invention relates to a method of providing a key, in particular for digitally signing, verifying or encrypting data to be exchanged between a first party and a second party, comprising steps of transmitting (100) an identification code, which is uniquely identifying said first party, from said first party to a gateway (CCBS), verifying (110) said identification code by said gateway (CCBS) by using (111) an authentication server (AUC), and creating (120) a signing key. Said method is characterized by providing (130) said signing key to said first party and/or to said second party. A transmission of said signing key via a secure communications channel, in particular via a GSM-based communications infrastructure, improves the security of payment transactions. The present invention further relates to a mobile terminal (1) and a gateway (CCBS).

Abstract: The invention concerns a method for supporting cashless payment as well as a payment interworking server, a mobile terminal and a computer program product for a cashless payment system. A mobile subscriber identity stored in the subscriber identification module of the mobile terminal is sent to a payment interworking unit. The payment interworking unit transmits the mobile subscriber identity to an authentication server of a mobile communication system which replies an authentication number and a signed response. The authentication number is sent to the mobile terminal which calculates a signed response and transmits the signed response to the payment interworking server. This server compares the singed responses received from the authentication server and from the mobile terminal and sends a confirmation message to a POS unit or a billing system, if the received signed result is correct.

Abstract: The invention relates to a method for supporting the charging of services in a communications network, and to a server, a computer program and a storage medium with a computer program for executing the method. Charging data relating to the charging of a service used by a user of the communications network is generated by a network element or a service server of the communications network. For the purpose of storing the generated charging data, the network element or the service server contacts a central memory service for several network elements and/or service servers. The central memory service stores the charging data in a charging data record, managed by it, which is assigned to the user of the communications network and is suitable for containing charging data relating to the use of two or more different types of services.