FIELD: satellite digital television systems. SUBSTANCE: satellite digital television system has plurality of computer attachments (STB) corresponding to plurality of end user television sets, modem and decoder arranged in each STB, subscriber authorizing system (SAS) incorporating or coupled with plurality of communication servers, facilities included in SAS for generating entitlement management messages (EMM), return channel connecting separate STBs with SASs, facilities included in SAS and in each STB so that desired information for entering respective EMM in system is submitted directly to respective communication server incorporated in SAS or coupled with the latter to authorize mentioned EMM transmission, and/or facilities for connecting modem to return channel, and facilities enabling EMM transmission to decoder directly from respective server incorporated in SAS or coupled with the latter. Some other important features are also described. EFFECT: reduced delay time in transmitting entitlement management messages. 25 cl, 20 dwg
