522 search results - page 30 / 105 » Answering Aggregation Queries in a Secure System Model |
CSFW
2011
IEEE
12 years 7 months ago
2011
IEEE
—This paper explores the idea of knowledge-based security policies, which are used to decide whether to answer queries over secret data based on an estimation of the querier’s ...
TKDE
2008
13 years 7 months ago
2008
Data stream management systems need to control their resources adaptively since stream characteristics and query workload may vary over time. In this paper we investigate an approa...
TCSV
2008
13 years 7 months ago
2008
In this paper, we present a robust passage retrieval algorithm to extend the conventional text question answering (Q/A) to videos. Users interact with our videoQ/A system through n...
PSD
2004
Springer
14 years 1 months ago
2004
Springer
In an on-line statistical database, the query-answering system should prevent answers to statistical queries from leading to disclosure of confidential data. On the other hand, a s...
EDBT
2009
ACM
13 years 11 months ago
2009
ACM
We investigate the problem of refining SQL queries to satisfy cardinality constraints on the query result. This has applications to the many/few answers problems often faced by da...