1. Conditional access system for controlling the access of receivers ( 7 ) of end-users to a data content source ( 2 ) in an uplink system ( 1 ), said uplink system comprising a scrambler ( 4 ) for scrambling data content supplied from the data content source ( 2 ), an entitlement control message generator ( 6 ) for generating entitlement control messages (ecm) containing a control word (cw) and an entitlement identification and a transmitter for transmitting the scrambled data content and the entitlement control messages, in which a descrambler ( 8 ), and an entitlement control message decoder ( 9 ) are associated to the receiver ( 7 ), and in which if a match between the entitlement in the entitlement control message (ecm) and the entitlement of the end-user exists, the entitlement control message decoder ( 9 ) supplies a control word (cw) to the descrambler ( 8 ) for descrambling a part of the received scrambled content for which the receiver is entitled, characterized in that a separator ( 3 ) is provided, coupled to the data content source ( 2 ) for separating a part of the data content from said source into at least one object data stream (os 1 ) representing a preselected object of the data content part and a remaining data stream (rs) representing the data content part without the object data, that the at least one object data stream is supplied to the input of the scrambler ( 4 ) and that a combiner ( 10 ) is connected to the output of the descrambler ( 8 ) for combining the descrambled object data (dos 1, dos 2 ) with the remaining data content (rs), in which an individual entitlement is allocated to said object.