Method and apparatus for detecting downloadable conditional access system host with duplicated secure micro

A Downloadable Conditional Access System Provisioning Server (DPS) detecting a duplicated secure micro, comprising:

• a database to store a time when a host is finally authenticated in a first address, the time being received from an AP server;
• an authentication time difference information generation unit to receive a time when the host is authenticated in a second address from the AP server, and generate authentication time difference information associated with a value of a difference between the time when the host is finally authenticated in the first address and the time when the host is authenticated in the second address;
• a time comparison unit to compare the authentication time difference information with a first reference value and a second reference value, the second reference value being less than the first reference value;
• and
• a duplication determination unit to determine whether the secure micro is duplicated based on a result of the comparing.

An operation method of an AP server, comprising:

• transmitting, to a DPS, a time when a host is finally authenticated in a first address and a time when the host is authenticated in a second address;
• collecting, when a value of a difference is between a predetermined first reference value and second reference value, IDs of a secure micro of the host in response to a request for collecting the IDs of the secure micro from the DPS, the value of the difference being a difference between the time when the host is finally authenticated in the first address and the time when the host is authenticated in the second address;
• and
• transmitting the collected IDs to the DPS.

An operation method of a subscriber management system, the operation method comprising:

• receiving a request for denying a program access authority of a secure micro from a DPS, when the DPS determines that the secure micro is duplicated;
• detecting a host where the secure micro is installed using the request for denying the program access authority of the secure micro;
• and
• denying the program access authority of the host,
• wherein the DPS determines whether the secure micro is duplicated based on authentication time difference information, first reference value, and second reference value, the authentication time difference information being a value of a difference between a time when a host is finally authenticated in a first address and a time when the host is authenticated in a second address, the second reference value being less than the first reference value.