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1.发明授权Fine-grained access control in a database by preventing information leakage and removing redundancy 失效通过防止信息泄漏和消除冗余，在数据库中进行细粒度的访问控制公开(公告)号：US07685194B2
公开(公告)日：2010-03-23
申请号：US11468928
申请日：2006-08-31
CPC分类号： G06F17/30471 , G06F17/30306 , G06F21/6227
摘要： Fine-grained access control for querying a database with low overhead and safety plans. In a view placement approach, base relations of the query expression are replaced by views that are appropriate for the particular user. Information leakage via UDF pushing, exception processing, and error messages can be prevented by generating safe plans. An existing query optimizer can be modified to perform redundancy removal and safe plan implementation. Subsumption testing available in materialized view matching can be exploited by the query optimizer. Authorization inference is exploited to generate safe plans.
摘要翻译： 用于以低开销和安全计划查询数据库的细粒度访问控制。 在视图放置方法中，查询表达式的基础关系被替换为适合特定用户的视图。 可以通过生成安全计划来防止通过UDF推送，异常处理和错误消息的信息泄漏。 可以修改现有的查询优化器，以执行冗余删除和安全计划实施。 查询优化器可以利用实体化视图匹配中的可用度量测试。 利用授权推理来制定安全计划。
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2.发明申请FINE-GRAINED ACCESS CONTROL IN A DATABASE BY PREVENTING INFORMATION LEAKAGE AND REMOVING REDUNDANCY 失效通过防止信息泄漏和删除冗余来进行数据库中的细粒度访问控制公开(公告)号：US20080071785A1
公开(公告)日：2008-03-20
申请号：US11468928
申请日：2006-08-31
IPC分类号： G06F17/30
CPC分类号： G06F17/30471 , G06F17/30306 , G06F21/6227
摘要： Fine-grained access control for querying a database with low overhead and safety plans. In a view placement approach, base relations of the query expression are replaced by views that are appropriate for the particular user. Information leakage via UDF pushing, exception processing, and error messages can be prevented by generating safe plans. An existing query optimizer can be modified to perform redundancy removal and safe plan implementation. Subsumption testing available in materialized view matching can be exploited by the query optimizer. Authorization inference is exploited to generate safe plans.
摘要翻译： 用于以低开销和安全计划查询数据库的细粒度访问控制。 在视图放置方法中，查询表达式的基础关系被替换为适合特定用户的视图。 可以通过生成安全计划来防止通过UDF推送，异常处理和错误消息的信息泄漏。 可以修改现有的查询优化器，以执行冗余删除和安全计划实施。 查询优化器可以利用实体化视图匹配中的可用度量测试。 利用授权推理来制定安全计划。
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