2386 search results - page 253 / 478 » Database Security 2000 |
CCS
2007
ACM
15 years 5 months ago
2007
ACM
We present Asirra (Figure 1), a CAPTCHA that asks users to identify cats out of a set of 12 photographs of both cats and dogs. Asirra is easy for users; user studies indicate it c...
104
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SACMAT
2010
ACM
15 years 3 months ago
2010
ACM
Access to distributed databases containing tuples collected about mobile physical objects requires information about the objects’ trajectories. Existing access control models ca...
FCCM
2004
IEEE
15 years 2 months ago
2004
IEEE
Intrusion detection for network security is a computation intensive application demanding high system performance. System level design, a relatively unexplored field in this area,...
85
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ICCV
2009
IEEE
16 years 4 months ago
2009
IEEE
In this paper we explore the use of shapes of noses for
performing partial human biometrics. The basic idea is to
represent nasal surfaces using indexed collections of isocurves,...
119
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SIGMOD
2001
ACM
15 years 11 months ago
2001
ACM
The ability to approximately answer aggregation queries accurately and efficiently is of great benefit for decision support and data mining tools. In contrast to previous sampling...