| 摘要 |
The invention concerns a data exchange system on a data transfer network (2) between a receiver station (6) and a data (I*) server (4) with conditional access, wherein data exchanges over the network (2) are managed and authorized by a control server (20). The invention is characterized in that said control server (20) is associated with: automatic means (7, 22, 24) forming a catalogue of useable access instruments, accessible to a user of said receiver station (6) for selection, by said user, of one of the access instruments; automatic means (26) for determining corresponding control parameters of data exchange control over said network (2); and automatic means (28) for controlling data exchanges over said network (2) based on the thus determined parameters. |
