INFORMATION PROCESSOR, NETWORK SYSTEM, DIGITAL INFORMATION CERTIFYING METHOD, STORAGE MEDIUM AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an information processor which provides digital information of high certifiability since it cannot be altered and is reliable. SOLUTION: The information processor (digital camera) 110 obtains a digital certificate 302 to digital information (digital image) 304 by requesting it to a prescribed system (certifying agency) 130 through a communication means (network) 120, and embeds the digital certificate 302 to digital information 304 as electronic digital watermark information.