| 摘要 |
PROBLEM TO BE SOLVED: To generate document information that prevents replacement of hidden words from being recognized as compared with when the words are replaced by encrypted information.SOLUTION: A document information generation apparatus includes: an HDD 14d storing hidden words 18b and attributes 18a of the hidden words in association with each other, and storing, in association with the hidden words 18b having a predetermined attribute, at least one candidate word 20a having a predetermined attribute, which is to be replaced by the hidden words having the predetermined attribute; and a generation means for applying to document information either first replacement in which a hidden word included in the document information which has the predetermined attribute is replaced by any candidate word stored in the HDD 14d, or second replacement in which a hidden word included in the document information which has an attribute other than the predetermined attribute is replaced by a word generated by characters selected at random from a predetermined character group, to thereby generate new document information. |
