Imprinting the id information to the digital content, a method and apparatus for reading this

(57) Abstract: after the digital content is loaded into the information terminal such as a PC, ID information specific to the viewer or user of the PC is imprinted on its content. ID information is imprinted at a predetermined position of the content. Or it may be imprinted over the entire content in the form of a spatial frequency. Imprinted content of the ID is available in the following terminal.