Downloadable conditional access system service providing apparatus and method

A DCAS service providing method, comprising:

• performing a mutual authentication with respect to an AP server and a DCAS host;
• transmitting, by the AP server, operating environment information and host identification information to a PS based on the mutual authentication, the operating environment information and host identification information being extracted by the AP server;
• selecting, by the PS, image information by referring to the host identification information, the operating environment information, and policy information agreed to by a CAS server and the PS;
• transmitting, by the PS, the image information to a code download server;
• and
• transmitting the image information to the DCAS host, when access information of the received image information is transmitted to the DCAS host through the PS and the AP server.

A DCAS service providing method, comprising:

• connecting to a DCAS host;
• confirming host identification information and operating environment information of the DCAS host;
• determining whether the DCAS host is subscribed to a fee-based CAS broadcasting service as a result of the confirmation;
• selecting image information corresponding to the host identification information, when the DCAS host is subscribed to the fee-based CAS broadcasting service;
• setting a person-to-person transmission as a transmission scheme of the image information;
• uploading the image information to the DCAS host through a code download server;
• and
• providing download access information of the fee-based CAS broadcasting service to the DCAS host.

A DCAS service providing method, comprising:

• determining policy information by agreeing on whether to support a fee-based CAS broadcasting service between a CAS server and a DCAS headend;
• generating image information using the CAS server, and transmitting the image information to the DCAS headend;
• performing a mutual authentication between the DCAS headend and a DCAS host, and transmitting host identification information and version information by the DCAS host to the DCAS headend;
• selecting the image information using the DCAS headend, and transmitting the selected information to the DCAS host;
• determining whether the DCAS host is subscribed to the fee-based CAS broadcasting service of a DCAS server based on the policy information, the fee-based CAS broadcasting service corresponding to the image information;
• and
• providing, by the DCAS headend, the DCAS host with the fee-based CAS broadcasting service, when the DCAS host is subscribed to the fee-based CAS broadcasting service.