DOCUMENT-PRODUCING DEVICE FOR ALTERATION VERIFICATION, DOCUMENT ALTERATION VERIFYING DEVICE, DOCUMENT-PRODUCING METHOD FOR ALTERATION VERIFICATION, DOCUMENT ALTERATION VERIFYING METHOD, DOCUMENT-PRODUCING PROGRAM FOR ALTERATION VERIFICATION, DOCUMENT ALTERATION VERIFYING PROGRAM, RECORDING MEDIUM STORED WITH THE DOCUMENT-PRODUCING PROGRAM FOR ALTERATION VERIFICATION, AND RECORDING MEDIUM STORED WITH THE DOCUMENT ALTERATION VERIFYING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a production technique for a documents enabling easy verification of alterations, even when a piece of paper of characters etc., is stuck and copied to the character part of, specially, printed matter or other characters are pasted on the character part of an electronic document, and to provide a verification technique for alterations. PSOLUTION: A document producing device 1 for tampering verification is equipped with a processed document image acquiring means 111 for acquiring a document image to be produced, an area defining means 112 of defining a plurality of areas that adjacent areas overlap on the document image acquired by the processed document image acquiring means, and an alteration verification information embedding means 113 of dividing and embedding alteration verification information in parts of each area which overlap and do not overlap an adjacent area, respectively. PCOPYRIGHT: (C)2005,JPO&NCIPI