| 摘要 |
The aim of the present invention is to make available the same means of restriction in the mobile world as is applied with fixed receivers. This aim is achieved by a method of conditional access to a digital data stream encrypted with at least one control word and broadcast via a transmitter of a broadcasting network to at least one item of mobile equipment, this transmitter also transmitting a stream of control messages containing the control words and the access conditions, this item of mobile equipment also being connected to a mobile communication network via a mobile access point, said method is characterized in that it comprises the following steps: - receiving by the mobile equipment the stream of control messages, - determining a location identifier for said mobile either by the identifier of the mobile access point, or by the identifier of the transmitter of the broadcasting network, - verifying the access conditions contained in the control message, said conditions comprising a reception condition related to at least one mobile access point identifier and/or an identifier of a transmitter of the broadcasting network, - comparing the location identifier with the identifier or identifiers contained in the access conditions, - blocking access to said data stream if the comparison is positive. |
