Method, apparatus, computer program, data storage medium and computer program product for preventing reception of media data from a multicast service by an unauthorized apparatus

摘要

The method for the transmission of media data from a multicast service by a first apparatus to a plurality of second apparatuses is suitable for preventing reception of the media data by an unauthorized second apparatus using a security process. A first apparatus is provided which can be used to provide the media data protected by a security process. A third apparatus is provided which can be used to perform the security process with the first apparatus, performance of the security process between the first apparatus and the third apparatus and, on the basis of this, interchange of at least security data between the first apparatus and the third apparatus in order to provide the media data. A second apparatus is selected which can be used to perform at least one reception process for receiving the media data. A first data transmission link is selected which can be used to couple the first apparatus and the second apparatus at least for the purpose of transmitting the media data. The provided media data is received using the second apparatus via the first data transmission link.

主权项

1. A method for the transmission of media data as a multicast service to a plurality of second apparatuses, comprising:
providing a first apparatus which multicasts the media data protected by a security process to the plurality of second apparatuses; providing a third apparatus to initiate messages and exchange security data with the first apparatus for a security process preventing an unauthorized second apparatus from receiving the media data; selectively determining, by a third apparatus, a chosen second apparatus from a plurality of second apparatuses to receive the media data where the third apparatus acts as a remote control for the chosen second apparatus; selecting a first data transmission link to connect the first apparatus and the chosen second apparatus to transmit the media data; receiving the media data at the chosen second apparatus via the first data transmission link; and selecting a second data transmission link to connect the third apparatus and the chosen second apparatus and at least part of the security data is transmitted from the third apparatus to the chosen second apparatus via the second data transmission link, wherein a third data transmission link connects the first apparatus and the third apparatus and the security data is exchanged between the first apparatus and the third apparatus using the third data transmission link, and wherein control data is transmitted via at least one of the first data transmission link, the second data transmission link, and the third data transmission link.