| 摘要 |
<p>A data processor (100) according to embodiments includes a storage unit (111), a data converter (102), a first transmitting unit (103), a query expression converter (105), a second transmitting unit (106), and a receiving unit (107). The storage unit stores therein a set of character strings that is a set of a plurality of character string elements of which magnitude correlation is uniquely identifiable. The data converter encrypts numerical data included in data to be managed, generates an index value corresponding to the numerical data using the character string elements included in the set of character strings, and generates converted data to be managed including the encrypted numerical data and the index value. The first transmitting unit transmits the converted data to be managed to a server. The query expression converter converts a condition part including a numerical value of a query expression into a condition part including the character string elements included in the set of character strings to generate a converted query expression. The second transmitting unit transmits the converted query expression to the server. The receiving unit receives a result of query processing executed using the converted query expression from the server.</p> |
