| 摘要 |
PROBLEM TO BE SOLVED: To provide a distributed DB processing apparatus, a processing method and a processing program, which can prevent leakage of information in such a form that an individual can be specified, and facilitating retrieval not leaking individual information.SOLUTION: The distributed database system includes: a first storage part 110 for distributing and storing divided data; a second storage part 120 for distributing and storing encrypted data which are the duplicate of the data stored in the first storage part 110; a request determination part 351 for determining whether a retrieval request input from an input part 400 requires the connection of the divided data; a first retrieval part 352 for retrieving the data from the first storage part 110 when determined that the connection of the data is not required; and a second retrieval part 354 for retrieving the data from the second storage part 120 when determined that the connection of the data is required. |
