233 search results - page 30 / 47 » CAPTCHA: Using Hard AI Problems for Security |
ACNS
2010
Springer
15 years 29 days ago
2010
Springer
Verifiably encrypted signature schemes (VES) allow a signer to encrypt his or her signature under the public key of a trusted third party, while maintaining public signature verifi...
IPSN
2009
Springer
15 years 4 months ago
2009
Springer
We consider the problem of monitoring spatial phenomena, such as road speeds on a highway, using wireless sensors with limited battery life. A central question is to decide where ...
JSAC
2008
14 years 9 months ago
2008
In this paper, we investigate the coverage problem in wireless sensor networks using a game theory method. We assume that nodes are randomly scattered in a sensor field and the goa...
CCS
2005
ACM
15 years 3 months ago
2005
ACM
In a reputation-based trust-management system, agents maintain information about the past behaviour of other agents. This information is used to guide future trust-based decisions...
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KDD
2003
ACM
15 years 10 months ago
2003
ACM
High-dimensional collections of 0-1 data occur in many applications. The attributes in such data sets are typically considered to be unordered. However, in many cases there is a n...