METHOD FOR MANAGING AND CONTROLLING ENTITLEMENT IN CHARGEABLE BROADCASTING SYSTEM FOR SUPPORTING VARIOUS PAY-PER-VIEW SERVICES

摘要

PURPOSE: A method for managing and controlling an entitlement in a chargeable broadcasting system for supporting various pay-view services is provided to classify a series by setting a proper theme ID and an event ID when a qualification managing message is created. CONSTITUTION: A key ID(21) is used for a cryptography of a plurality of information(22, 23, 24, 25, 26). Mask information(22) is a value for deciding an application range of a theme ID(23) and an event ID(24). The mask information(22) is identified with the sum of sizes of two fields. EXTM information(25) indicating an expiration time is used for deleting a qualification record exceeding to the time from a memory by an interior operation of a smart card. DUR information(26) is valid only in the case of a PPP service. The information from the mask information(22) to the DUR information(26) means a watching right of each member. If the corresponding qualification is valid, the information is stored in a card memory. In the case of a PPE(pay-per-event), the total value of the theme ID(TID)(23) and an event ID(EID)(24) becomes a valid program ID. In the case of a PPS(pay-per-series), the DUR information(26) is ignored and a bit calculation logical value of the mask information(22) and the theme ID(TID)(23) become a series. In the case of a PPP(pay-per-period), a user can watch from a starting time of watching of a chargeable program to a time passed for the DUR, and if the smart card receives a qualification managing message, one's expiration time is changed into a time adding the current time to the DUR, and thus the corresponding service is possible.