DATA DISCLOSURE APPARATUS, AND DATA DISCLOSURE METHOD

Data is disclosed only when a utilization purpose is met, and a risk that the disclosed data is referenced for other purposes is reduced. A data disclosure apparatus discloses data in response to a query from a user, and includes at least one computation device, at least one memory resource, and at least one storage device. The computation device receives the query, checks whether or not the query complies with a predetermined rule, searches table data as query processing responding to the query to acquire a result of query execution when the query is confirmed to comply with the predetermined rule, encrypts the result of query execution using a public key corresponding to a private key held by the user, and provides the encrypted result of query execution to the user.