Abstract: An item delivery service capable of distributing items while maintaining anonymity between an exhibitor (vendor) and a successful bidder (purchaser) is provided. According to a delivery management system (when used for an escrow system) of the present invention, an exhibitor terminal 240 is notified only of information about a delivery service base in charge of an address of a successful bidder for delivery of an item. Accordingly, the item can be delivered up to the delivery service base even when the exhibitor does not know personal information such as the address and name of the successful bidder. On the other hand, a service base terminal 232 of the delivery service base where the item arrives is notified of personal information of the successful bidder.

Abstract: A content server 10, in transmitting content appended with redistribution restriction information to a communication terminal 50, determines whether communication terminal 50 has a redistribution restriction function on the basis of identification data contained in a user agent header contained in a HTTP message transmitted from communication terminal 50. When the determination is affirmative, content server 10 transmits to communication terminal 50 the content via the Internet 20, gateway server 30, and mobile packet communication network 40.

Abstract: A content server 10, in transmitting content appended with redistribution restriction information to a communication terminal 50, determines whether communication terminal 50 has a redistribution restriction function on the basis of identification data contained in a user agent header contained in a HTTP message transmitted from communication terminal 50. When the determination is affirmative, content server 10 transmits to communication terminal 50 the content via the Internet 20, gateway server 30, and mobile packet communication network 40.

Abstract: It is possible to use a content in various ways while protecting rights assigned to the content including copyright. Output permission level judgment means (22) judges an output permission level (L1 to Ln) described in content files (F1 to Fn). According to the output permission level (L1 to Ln), output control means (23) permits the content files (F1 to Fn) to be stored in internal storage means (24) and an external memory (27) or image-output to a main body monitor (25) and an external monitor (26) or transferred via a communication network (11).