Fecha de publicación: 03/04/2008 Fuente: Wipo "digitalization" Certification/verification of authenticity and integrity of a digital document can be achieved, using meta information and content information and third-party certification thereof is achieved.
A digital information verification program stored in a recording medium according to the present invention allows a computer to determine presence/absence of any change made to the digital information and identify the changed part by the following steps: generating the feature amount information with respect to the digital information to be verified and registering it in association with the digital document; in the case where any operation is made to the digital information, acquiring the feature amount information (meta information related parameters and content information related parameters) of the meta information and content information concerning the operation, the feature amount information including the same items (meta information and content information) as those of the feature amount information related to the digital information before being operated; and comparing the feature amount information before and after the operation.