公开(公告)号：US20240086564A1

公开(公告)日：2024-03-14

申请号：US18244407

申请日：2023-09-11

Applicant: Hitachi, Ltd.

Inventor： Divya SINGH ,  Satoshi KATSUNUMA ,  Toshihiko KASHIYAMA ,  Mika TAKATA ,  Prashant Kumar SHARMA

IPC: G06F21/62

CPC classification number: G06F21/6227

Abstract: To improve resource utilization efficiency of query compliance check, which is check as to whether a query complies with a restriction imposed on data. The query compliance check is roughly divided into data flow policy check as to whether a data flow policy that defines a restriction on data transfer within a county or between countries is complied with, and organization rule check as to whether an organization rule that defines a restriction on sharing outside an organization is complied with, which are hierarchically configured. By analyzing a received query, a system identifies one or more data items as target input/output (I/O) data according to the query, and executes the data flow policy check on the identified one or more data items. When a result of the data flow policy check is false, the system returns a result that the query is compliance violation without executing the organization rule check.

公开(公告)号：US20250110958A1

公开(公告)日：2025-04-03

申请号：US18903945

申请日：2024-10-01

Applicant: Hitachi, Ltd.

Inventor： Divya SINGH ,  Toshihiko KASHIYAMA ,  Tianben DING

IPC: G06F16/2453

Abstract: A query processing device that reduces the calculation cost for checking whether a query complies with restrictions. A query dividing section generates subqueries by dividing an input query for each of a plurality of organizations. A score computing section computes an organization score by evaluating an organization-specific risk that is the risk of determination that the subquery does not comply with organization rules of the organization corresponding to the subquery, on the basis of history information relating to a determination track record resulting from determining, regarding each organization, whether or not the input query complies with the organization rules of each organization. A subquery control section sequentially transmits the subqueries to rule check devices in transmission order according to the organization score, and response information is received regarding the subquery from the rule check devices. Whether the input query complies with restrictions is determined by using the response information.