Patent ID: 8260919

Claim:
A download policy determination method in a Downloadable Conditional Access System (DCAS), the download policy determination method comprising: analyzing version information of Secure Micros (SMs) and version information of SM clients, the version information of the SMs and the version information of the SM clients being provided from an Authentication Proxy (AP) server, the SM clients being installed in the SMs; determining a download policy based on a result of the analysis, wherein the determined download policy configures a download time of each of at least two or more different target clients for the SMs, wherein the download time of each of the least two or more different target clients for the SMs are proportionally distributed based on a number of SMs requiring downloads of each of the respective different target SM clients, and wherein a transmission interval of a Security Announce (SA) message associated for each of the respective target SM clients is inversely proportionally to the number of SMs requiring downloads of each of the respective target SM clients increases; and providing the AP server with information associated with the determined download policy.