Patent ID: 8145609

Claim:
An information processing device, including a processor, comprising: a digital-information generating unit that serially generates, via the processor, pieces of first digital information; an identifier assigning unit that assigns different identifiers to the respective pieces of first digital information generated by the digital-information generating unit; an attribute setting unit that sets an attribute of each first digital information so as to include the identifier assigned to each first digital information; and an electronic signing unit that electronically signs each first digital information to which the attribute setting unit sets the attribute including the corresponding identifier, wherein each identifier includes information representing seriality of first digital information neighboring to the first digital information corresponding to each identifier in a generation order, the digital-information generating unit generates the pieces of first digital information of images of a plurality of documents by scanning the plurality of documents, each identifier includes a counting value obtained by counting a number of scanning times whenever the digital-information generating unit scans a document, and each identifier includes second digital information that is decryptable, at least a part of the second digital information being able to be embedded between the first digital information corresponding to each identifier and the first digital information neighboring to the corresponding first digital information in the generation order.