Server, authentication server, content delivery system, and program

An authentication server used in a content delivery system to deliver contents via a network to a plurality of an information processing terminals used by a service user, the content delivery system including a delivery server and the authentication server, the authentication server comprising:

• a managing unit which manages unique information of an information processing terminals as the device authentication IDs and, information relating to the service user as a user authentication ID, and which collectively manages, as ID management information, each device authentication ID and the user authentication ID both of which are associated with each other;
• a responding unit which responds to a content delivery request issued by the use of each device authentication ID from the information processing terminal;
• an acquiring unit which acquires the user authentication ID collectively managed with each device authentication ID with reference to the ID management information;
• an authentication unit which performs an authentication relating to the content delivery request by the use of the user authentication ID;
• and
• an additional information generating unit which generates additional information corresponding to each device authentication ID to transmit the additional information to the delivery server along with an authentication result and to continuously deliver the contents to the service user even when the information processing terminals are changed from one to another by the service user.

A content delivery system for delivering contents via a network to a plurality of information processing terminals used by a service user, the content delivery system having an authentication unit for authenticating a user and a delivery unit for delivering contents, the content delivery system characterized comprising:

• a managing unit which manages, as a device authentication IDs, unique information of an information processing terminals used by the service user;
• a managing unit which manages information relating to the service user as a user authentication ID;
• and
• a managing unit which collectively manages, as ID management information, each device authentication ID and the user authentication ID in associated with each other;
• wherein:
• the authentication unit responds to a content delivery request using each device authentication ID given from each information processing terminal to acquire the user authentication ID collectively managed with the device authentication ID with reference to the ID management information, and to authenticate the content delivery request by the use of the user authentication ID,
• wherein:
• the delivering unit continuously delivers, in response to an authentication result, requested contents to the service user even when the information processing terminals are changed from one to another by the service user.

A content delivery method of delivering content to each information processing terminals by the use an authentication unit which authenticates a service user and a content delivery server which delivers content, comprising:

• Managing as a device authentication IDs, unique information of each information processing terminals used by the service user;
• managing as a user authentication ID, information relating to the service user;
• collectively managing as ID management information, the device authentication IDs and the user authentication ID in associated with each other;
• responding to a content delivery request from each information processing terminal by the use of the device authentication ID, to acquire the user authentication ID collectively managed with each device authentication ID with reference to the ID management information;
• and authenticating the content delivery request by the use of the user authentication ID, by using the authentication unit;
• and
• delivering requested contents in response to an authentication result, by using the delivery server.