522 search results - page 32 / 105 » Answering Aggregation Queries in a Secure System Model |
ICDE
2007
IEEE
14 years 2 months ago
2007
IEEE
Trust management is a form of access control that uses delegation to achieve scalability beyond a single organization or federation. However, delegation can be difficult to contr...
ICICS
2007
Springer
13 years 11 months ago
2007
Springer
Authentication is increasingly relevant to data management. Data is being outsourced to untrusted servers and clients want to securely update and query their data. For example, in ...
ICDT
1999
ACM
14 years 11 hour ago
1999
ACM
In data integration systems, queries posed to a mediator need to be translated into a sequence of queries to the underlying data sources. In a heterogeneous environment, with sour...
DAGSTUHL
2007
13 years 9 months ago
2007
Abstract. Moving objects produce trajectories, which are stored in databases by means of finite samples of time-stamped locations. When also speed limitations in these sample poin...
ICLP
2007
Springer
14 years 1 months ago
2007
Springer
This paper describes the dlvhex SPARQL plugin, a query processor for the upcoming Semantic Web query language standard by W3C. We report on the implementation of this languages usi...