Patent ID: 7092910

Claim:
A system for attaching first information to digital data, said system comprising: a first terminal comprising: first receiver means for receiving the first information and the digital data; selector means for selecting a first attachment scheme from a plurality of attachment schemes based on one of an attribute of the digital data or an attribute of the first information; and first transmitter means for transmitting the digital data, the first information, and second information indicating the selected first attachment scheme; a second terminal comprising: second receiver means for receiving the digital data, the first information, and the second information; first attachment means for attaching the second information to the digital data using a second attachment scheme that is predetermined; and second transmitter means for transmitting the first information and the digital data to which the second information is attached; and a third terminal comprising: third receiver means for receiving the first information and the digital data to which the second information is attached; extractor means for extracting the second information from the digital data using an extraction scheme corresponding to the predetermined second attachment scheme; and second attachment means for attaching the first information to the digital data using the first attachment scheme indicated by the second information extracted by said extractor means.