LEARNING METHOD, LEARNING APPARATUS, LEARNING PROGRAM, RETRIEVAL METHOD, RETRIEVAL APPARATUS AND RETRIEVAL PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a learning method, a learning apparatus, a learning program, a retrieval method, a retrieval apparatus and a retrieval program capable of performing mechanical learning using teacher data including an encryption keyword.SOLUTION: A learning method extracts an encryption word included in a plurality of pieces of teacher data, generates a plurality of new pieces of teacher data in which the other encryption word except for any of the encryption word among the plurality encryption words having the same plaintext included in the extracted encryption word are replaced with any of the encryption word, and mechanically learns a conversion parameter converting the encryption word in association with first information among the encryption words included in the plurality of generated new pieces of teacher data into the encryption word in association with second information.SELECTED DRAWING: Figure 4