| 摘要 |
The invention consists of a system and method for controlling an access of at least one user (10) to a transmission, transmitted by a transmission initiator (320) having transmission means (321) arranged to transmit, in a communications system (1000) comprising:
- defining means (432) adapted to define a type of user permitted to receive said transmission by including in a user type entry a field comprising information indicating that said at least one users (10) can only receive said transmission;
- authenticating means (422) adapted, during a joining phase, to authenticate that each one of said at least one users (10) joining said transmission is permitted to receive said transmission;
- permitting means (312) adapted upon completion of said authentication, to permit said at least one users (10) having been authenticated to receive said transmission. |
