| 摘要 |
The invention relates to a mobile radio-based transaction system, comprising at least one mobile telephone (36), at least one transaction terminal (34) and at least one system server (38) for processing a cashless monetary transaction. Within a multi-level security system (10), in a second level (14) the location of a user or of the client (36) within a mobile radio network (32) is compared and/or the location of the subscriber in a satellite positioning system (30) is determined. In a first level (12), a two-factor authentication (18, 62, 64, 66) is performed. A further security verification, for example via biometric features, can be added in an optional third level. |
