Patent ID: 6823366
Filing Date: 2004-11-23
Classification: H04L

Abstract:
A contents delivery system comprising a client machine that executes a client program capable of requesting delivery of contents and a server machine that has a storage for storing contents and executes a server program capable of transmitting the contents requested by the client machine to the client machine,said server machine further comprising: an ID issuance part for issuing a delivery confirmation ID that is uniquely related to contents requested by the client machine every time contents are requested by the client machine; a plug-in data creation part for creating plug-in data including said delivery confirmation ID, client information for uniquely specifying the client machine, and server information for uniquely specifying the server machine; a plug-in data transmission part for transmitting said plug-in data including the delivery confirmation ID related to the contents that have been transmitted to said client machine, when said client machine requests said plug-in data from said server machine after receiving the contents; and a delivery confirmation receiving part for receiving delivery confirmation data transmitted from the client machine, and said client machine comprising: a receiving part for receiving the content and the plug-in data transmitted by said server machine; a delivery confirmation transmission part for creating delivery confirmation data that includes the delivery confirmation ID and the client information contained in said plug-in data, and transmitting said delivery confirmation data to said delivery confirmation receiving part of said server machine in accordance with the server information contained in said plug-in data.