Abstract: A method is provided for synchronization of program masks, wherein the method comprises receiving a first request message from the first client means, wherein a first program mask is requested by the first request message, determining a first unique identifier for the requested first program mask, transmitting the requested first program mask and the first unique identifier to the first client means, receiving a second request message from the second client means, wherein the second request message comprises at least the first unique identifier, determining the first program mask, which is assigned to the received first unique identifier, and transmitting the determined first program mask to the second client means.