INFORMATION PROCESSOR, INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, STORAGE MEDIUM, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an information processor which enables the general user of objective digital data to detect the alteration of the objective digital data and to verify the originality of the document without adding the digital signature data of the objective digital data to the objective digital data. SOLUTION: An information processor 630(1) connectable onto a network 610 generates the digital signature data of the objective digital data, and registers the digital signature data concerned and the identification information added to the objective digital data into the data control side 620(2) on the network 610. COPYRIGHT: (C)2004,JPO