Abstract: In a system for controlling conditional access systems (143, 145, 147, 149) in a digital television decoder comprising a signal processing block with a decoder descrambler and a conditional access block with at least one conditional access system, each conditional access system (143, 145, 147, 149) is provided with a client (142, 144, 146, 148) supporting communication via a client interface (152). Furthermore, the conditional access block (141) is provided with a conditional access client manager (151), which handles communication with conditional access systems (143, 145, 147, 149) via the clients (142, 144, 146, 148) using a client interface (152) and controls descrambling of signal in the decoder by selecting a conditional access system (143, 145, 147, 149) responsible for descrambling a currently received signal and configuring the decoder descrambler (132) depending on the selected conditional access system (143, 145, 147, 149).

Abstract: A system for controlling smart card slots (121, 122, 123) of a device comprising smart card slots (121, 122, 123) providing access to smart card (111, 112, 113) resources via slot interfaces (103) and embedded systems (143, 145, 147, 151) requesting access to smart card resources, each embedded system (143, 145, 147, 151) provided with a client (142, 144, 146, 152), each client supporting communication via a client interface (153).