DEVICE AND METHOD FOR SETTING DOCUMENT ANONYMITY, COMPUTER-READABLE RECORDING MEDIUM WITH RECORDED ANONYMITY SETTING PROGRAM AND THE PROGRAM

摘要

PROBLEM TO BE SOLVED: To lower the operation cost by mechanizing the concealment of personal information and to adjust the degree of the concealment at need. SOLUTION: A document anonymity setting device is equipped with a document input part 10 which inputs a document, a specificity calculation part 12 which extracts a expression to be anonymized from the input document and calculates the specificity for evaluating how much the extracted expression to be anonymized can specify an individual, and an anonymity setting processing part 18 which sets anonymity on expressions having specificity larger than a predetermined threshold in the document. The specificity calculation part 18 extracts a person's name and its peripheral expressions from the input document, calculates the specificity for evaluating how much the extracted person's name and its peripheral expressions can specify the individual, and sets anonymity on the person's name and its peripheral expressions having specificity larger than the predetermined threshold by rewriting to meaningless expression or generalizing them, rewriting to low specifity setting, or ciphering them.