Abstract: A system for distributing digital contents over electronic network, the system includes: one or more management PCs configured to collect the digital contents and upload the collected digital contents to FTP servers; and one or more edge servers configured to download the digital contents in advance from the FTP servers, according to instructions from the management PC and deliver the downloaded digital contents to user terminals located in the same network as the edge server according to request from the user terminal.

Abstract: The present invention discloses an Internet billing method which can reject invalid orders with reliability, and which can be used without a credit card. In the present invention, a terminal makes a request of a content server for a chargeable service by using a prepaid information medium which has predetermined information necessary for transactions. After the request, the content server makes a request of a prepaid information management server for authentication to check whether the prepaid information medium is authorized to be used for the chargeable service, and for billing for the prepaid information medium. Then, the prepaid information management server authenticates the prepaid information medium and performs the billing for the prepaid information medium on the basis of usage of the chargeable service. If the authentication and the billing succeed, the content server provides the chargeable service to the terminal.