Patent ID: 7469231

Claim:
A system for receiving orders for prints of user's image data combined with the high resolution contents of a digital contents set from a user holding the user's image data, in which: the digital contents set comprises encoded low-resolution digital contents obtained by encoding low-resolution digital contents by a first public key, and encoded high-resolution digital contents obtained by encoding high-resolution digital contents by a second public key; the digital contents set, a first personal key corresponding to the first public key, a second personal key corresponding to the second public key and a third public key are distributed to users; a third personal key corresponding to the third public key is distributed to a service shop for printing the digital contents; a user terminal, to be used by a user to make an order for prints, makes combined image data by combining the user's image data with the low resolution digital contents decoded by the first personal key; the user terminal is caused to make encoded output data by encoding by the third public key output data obtained by combining the user's image data with the high resolution digital contents decoded by the second personal key in the same manner as in making the combined image data; the user transfers the encoded output data as well as an order for prints to the service shop; and the service shop prints the output data encoded by the third personal key.