756 search results - page 141 / 152 » Leveraging the CAPTCHA Problem |
CCS
2008
ACM
13 years 9 months ago
2008
ACM
To ensure that a trust negotiation succeeds whenever possible, authorization policy compliance checkers must be able to find all minimal sets of their owners' credentials tha...
DIM
2005
ACM
13 years 9 months ago
2005
ACM
We develop solutions for the security and privacy of user identity information in a federation. By federation we mean a group of organizations or service providers which have buil...
DEXA
2008
Springer
13 years 9 months ago
2008
Springer
We address the problem of maintaining continuous skyline queries efficiently over dynamic objects with d dimensions. Skyline queries are an important new search capability for mult...
ER
2008
Springer
13 years 9 months ago
2008
Springer
Abstract. Data in many industrial application systems are often neither completely structured nor unstructured. Consequently semi-structured data models such as XML have become pop...
INFOSCALE
2007
ACM
13 years 9 months ago
2007
ACM
We present a query-driven algorithm for the distributed indexing of large document collections within structured P2P networks. To cope with bandwidth consumption that has been ide...